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The Marshall Star for November 22, 2023


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The Marshall Star for November 22, 2023

Artemis II NASA astronauts Reid Wiseman and Christina Koch of NASA, and CSA (Canadian Space Agency) astronaut Jeremy Hansen view the core stage for the SLS (Space Launch System) rocket at the agency’s Michoud Assembly Facility in New Orleans on Nov. 16.

Artemis II Astronauts View SLS Core Stage at Michoud

Artemis II NASA astronauts Reid Wiseman and Christina Koch of NASA, and CSA (Canadian Space Agency) astronaut Jeremy Hansen viewed the core stage for the SLS (Space Launch System) rocket at the agency’s Michoud Assembly Facility on Nov. 16. The three astronauts, along with NASA’s Victor Glover, will launch atop the rocket stage to venture around the Moon on Artemis II, the first crewed flight for Artemis.

Artemis II NASA astronauts Reid Wiseman and Christina Koch of NASA, and CSA (Canadian Space Agency) astronaut Jeremy Hansen view the core stage for the SLS (Space Launch System) rocket at the agency’s Michoud Assembly Facility in New Orleans on Nov. 16.
From left, Artemis II NASA astronaut Reid Wiseman, CSA (Canadian Space Agency) astronaut Jeremy Hansen, NASA astronaut Christina Koch, and Boeing’s Amanda Gertjejansen view the core stage for the SLS (Space Launch System) rocket at the agency’s Michoud Assembly Facility on Nov. 16.
NASA / Michael DeMocker

The SLS core stage, towering at 212 feet, is the backbone of the Moon rocket and includes two massive propellant tanks that collectively hold 733,000 gallons of propellant to help power the stage’s four RS-25 engines. NASA, Boeing, the core stage lead contractor, along with Aerojet Rocketdyne, an L3Harris Technologies company and the RS-25 engines lead contractor, are in the midst of conducting final integrated testing on the fully assembled rocket stage. At launch and during ascent to space, the Artemis astronauts inside NASA’s Orion spacecraft will feel the power of the rocket’s four RS-25 engines producing more than 2 million pounds of thrust for a full eight minutes. The mega rocket’s twin solid rocket boosters, which flank either side of the core stage, will each add an additional 3.6 million pounds of thrust for two minutes.

Artemis II NASA astronauts Reid Wiseman and Christina Koch of NASA, and CSA (Canadian Space Agency) astronaut Jeremy Hansen view the core stage for the SLS (Space Launch System) rocket at the agency’s Michoud Assembly Facility in New Orleans on Nov. 16.
Artemis II NASA astronauts Reid Wiseman and Christina Koch of NASA, and CSA (Canadian Space Agency) astronaut Jeremy Hansen view the core stage for the SLS (Space Launch System) rocket at the agency’s Michoud Assembly Facility in New Orleans on Nov. 16.
NASA / Michael DeMocker

The astronauts’ visit to Michoud coincided with the first anniversary of the launch of Artemis I. The uncrewed flight test of SLS and Orion was the first in a series of increasingly complex missions for Artemis as the agency works to return humans to the lunar surface and develop a long-term presence there for discovery and exploration.

NASA is working to land the first woman and first person of color on the Moon under Artemis. SLS is part of NASA’s backbone for deep space exploration, along with the Orion spacecraft, advanced spacesuits and rovers, the Gateway in orbit around the Moon, and commercial human landing systems. SLS is the only rocket that can send Orion, astronauts, and supplies to the Moon in a single mission.

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Mission Success is in Our Hands: Jeramie Broadway

Mission Success is in Our Hands is a safety initiative collaboration between NASA’s Marshall Space Flight Center and Jacobs. As part of the initiative, eight Marshall team members are featured in new testimonial banners placed around the center. This is the first in a Marshall Star series profiling team members featured in the testimonial banners.

Jeramie Broadway is the center strategy lead for the Office of the Center Director.

Jeramie Broadway is center strategy lead at NASA’s Marshall Space Flight Center.
Jeramie Broadway is center strategy lead at NASA’s Marshall Space Flight Center.
NASA/Charles Beason

Before assuming this role, Broadway was senior technical assistant to the Marshall associate director, technical, from September 2021 to October 2022. In that capacity, he supported the development, coordination, and implementation of Marshall strategic planning and partnering within NASA and across industry and academia. Prior to that detail, he was the assistant manager of Marshall’s Partnerships and Formulation Office, providing strategic planning and business development support and creating new partnering and new mission opportunities for the center.

Broadway, a Dallas, Texas, native who joined NASA full-time in 2008, began his career in Marshall’s Materials and Processes Laboratory, supporting and leading production operations for the Ares I and Space Launch System program. Over the years, he served as project engineer or deputy project manager for a variety of work, including the Nuclear Cryogenic Propulsion Stage Project, for which he led development of advanced, high-temperature nuclear fuel materials. He was assistant chief engineer for launch vehicles for NASA’s Commercial Crew Program and assistant chief engineer for NASA’s Technology Demonstration Mission Program, managed for the agency at Marshall.

Question: What are some of your key responsibilities?

Broadway: Leading and implementing the center director’s strategic vision, leveraging, and integrating the strategic business units across the Marshall Center, one of NASA’s largest field installations, with nearly 7,000 on-site and near-site civil service and contractor employees and an annual budget of approximately $4 billion. Working closely in coordination and collaboration with every center organization to ensure Marshall’s planning, workflow, and business tactics align with the agency’s strategic priorities.

Question: How does your work support the safety and success of NASA and Marshall missions?

Broadway: My work as the center strategy lead is focused on the success and viability for the Marshall of the future. I work to pursue and capture programs, projects, and opportunities for Marshall to maintain ourselves as an engineering center of excellence. We work hard capturing opportunities to develop the skills, capabilities, and expertise to safely deliver on the vision and mission of the agency.

Question: What does the Mission Success Is In Our Hands initiative mean to you?

Broadway: Mission success is the responsibility of every single person at Marshall Space Flight Center, regardless of grade, position, or civil servant or support contractor. Everyone has a vital role in the success of Marshall and our ability to deliver on our mission. We all have the ability to lean forward, break down barriers, and strive for a culture that that says ‘yes, and…’.

Question: How can we work together better to achieve mission success?

Broadway: In this pursuits culture, it will take all of us to achieve the goals and objectives set forward by the agency and center leadership. We have a vibrant future with many opportunities coming our way and it will take all of us to make that vision a reality. It will take both our mission execution and our mission support organizations to get us there.

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Marshall Makes Impact at University of Alabama’s 8th Annual Space Days

By Celine Smith

Team members from NASA’s Marshall Space Flight Center participated in the 8th annual Space Days at UA (University of Alabama) on Nov 14-16, where more than 500 students met with experts from NASA and aerospace companies to learn more about the space industry.

During the three-day program, Marshall team members conducted outreach presentations and updates about the Artemis missions, HLS (Human Landing System), and other NASA programs, as well as how students can get involved in NASA’s internship program.

NASA astronaut Bob Hines delivers a presentation entitled, “An Astronaut’s Journey,” during the 8th annual Space Days at the UA on Nov. 16.
NASA astronaut Bob Hines delivers a presentation entitled, “An Astronaut’s Journey,” during the 8th annual Space Days at the UA on Nov. 16.
Matthew Wood

Kicking off the event was Aaron Houin, an engineer on the aerospace vehicle design and mission analysis team at Marshall. Houin delivered a detailed presentation on orbital mechanics and vehicle properties. Houin is no stranger to the classroom, as he is currently earning his doctorate at UA’s Astrodynamics and Space Research Laboratory and was eager to give back to his alma mater.

“Having been in their position studying the same theories, I emphasized how their coursework directly applies to physics-based modeling and trajectory design,” Houin said. “I’m hopeful sharing my experiences of transitioning from the classroom to the workplace will help others find similar success.”

The Marshall team also conducted an hour-long panel discussion and Q&A segment allowing students to learn more about the fields of aerospace and aeronautic research. Panelists included Christy Gattis, cross-program integration lead, and Kent Criswell, lead systems engineer, both representing the HLS team, as well as Tim Smith, senior mission manager of the TDM (Technology Demonstration Missions) program.

From left, Tim Smith, senior mission manager of the Technology Demonstration Missions Program, joins Human Landing System team members Christy Gattis, cross-program integration lead, and Kent Criswell, lead systems engineer, in speaking with attendees following a NASA panel discussion at the University of Alabama Space Days on Nov. 16.
From left, Tim Smith, senior mission manager of the Technology Demonstration Missions Program, joins Human Landing System team members Christy Gattis, cross-program integration lead, and Kent Criswell, lead systems engineer, in speaking with attendees following a NASA panel discussion at the University of Alabama Space Days on Nov. 16.
NASA/Christopher Blair

During the panel discussion, attendees were treated with a surprise guest speaker as Eric Vanderslice, stages structures sub element lead with SLS (Space Launch System), connected virtually from the Michoud Assembly Facility. Vanderslice shared insight about “America’s Rocket Factory” and progress for the agency’s Artemis II missions, including the recent installation of all four RS-25 engines onto the 212-ft-tall SLS core stage.

UA students also received a Tech Talk presentation focused on the SCaN (Space Communications and Navigation) program and related internship opportunities from team members from NASA’s Glenn Research Center and NASA Headquarters. Panelists included Dawn Brooks, program specialist at NASA Headquarters; Timothy Gallagher, senior project lead, and Molly Kearns, digital media specialist, all three representing SCaN’s Policy and Strategic Communications office.

And in true “One NASA” collaboration, joining the Glenn contingency for this Tech Talk was once again, Tim Smith, providing related updates on the Deep Space Optical Communications and the Laser Communications Relay Demonstration experiments.

Holly Ellis, communication specialist, and Tim Smith, senior mission manager, both of the Technology Demonstration Missions Program, speak with students during Space Days at the University of Alabama on Nov. 15.
Holly Ellis, communication specialist, and Tim Smith, senior mission manager, both of the Technology Demonstration Missions Program, speak with students during Space Days at the University of Alabama on Nov. 15.
NASA/Christopher Blair

The annual Space Days event concluded with NASA astronaut Bob Hines delivering a special presentation entitled, “An Astronaut’s Journey” to nearly 100 students, staff and industry partners. Hines completed his first spaceflight as a mission specialist for NASA’s SpaceX Crew-4 mission, serving as flight engineer of Expedition 67/68 aboard the International Space Station. 

Space Days is hosted by the UA College of Engineering and their staff shared how crucial it is to have support from aerospace industry partners willing to visit campus and meet students. Key partners exhibiting and presenting included Lockheed Martin, United Launch Alliance, Alabama Space Grant Consortium, and others.

“By the time our students attend a career fair, apply for an internship, or pursue cooperative education, they will have learned about these companies in a smaller setting and begin to consider the many pathways to success,” said Tru Livaudais, director of external affairs for UA College of Engineering. “This event offers all UA students – regardless of majors and specialties – a chance to explore future career possibilities and how to be a part of the cutting-edge research and opportunities in the space industry.”

Smith, a Media Fusion employee, supports the Marshall Office of Communications.

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NASA Telescope Data Becomes Music You Can Play

For millennia, musicians have looked to the heavens for inspiration. Now a new collaboration is enabling actual data from NASA telescopes to be used as the basis for original music that can be played by humans.

Since 2020, the “sonification” project at NASA’s Chandra X-ray Center has translated the digital data taken by telescopes into notes and sounds. This process allows the listener to experience the data through the sense of hearing instead of seeing it as images, a more common way to present astronomical data.

The Galactic Center sonification, using data from NASA’s Chandra, Hubble and Spitzer space telescopes, has been translated into a new composition with sheet music and score. Working with a composer, this soundscape can be played by musicians.
The Galactic Center sonification, using data from NASA’s Chandra, Hubble, and Spitzer space telescopes, has been translated into a new composition with sheet music and score. Working with a composer, this soundscape can be played by musicians. The full score and sheet music for individual instruments is available at: https://chandra.si.edu/sound/symphony.html
Composition: NASA/CXC/SAO/Sophie Kastner

A new phase of the sonification project takes the data into different territory. Working with composer Sophie Kastner, the team has developed versions of the data that can be played by musicians.

“It’s like a writing a fictional story that is largely based on real facts,” said Kastner. “We are taking the data from space that has been translated into sound and putting a new and human twist on it.”

This pilot program focuses on data from a small region at the center of our Milky Way galaxy where a supermassive black hole resides. NASA’s Chandra X-ray Observatory, Hubble Space Telescope, and retired Spitzer Space Telescope have all studied this area, which spans about 400 light-years across.

“We’ve been working with these data, taken in X-ray, visible, and infrared light, for years,” said Kimberly Arcand, Chandra visualization and emerging technology scientist. “Translating these data into sound was a big step, and now with Sophie we are again trying something completely new for us.”

In the data sonification process, computers use algorithms to mathematically map the digital data from these telescopes to sounds that humans can perceive. Human musicians, however, have different capabilities than computers.

Kastner chose to focus on small sections of the image in order to make the data more playable for people. This also allowed her to create spotlights on certain parts of the image that are easily overlooked when the full sonification is played.

“I like to think of it as creating short vignettes of the data, and approaching it almost as if I was writing a film score for the image,” said Kastner. “I wanted to draw listener’s attention to smaller events in the greater data set.”

A musical ensemble performs soundscape that composer Sophie Katsner created using data sonifications from NASA’s Chandra, Hubble and Spitzer space telescopes. Based in Montreal, Ensemble Éclat is dedicated to the performance of contemporary classical music and promoting the works of emerging composers. (NASA/CXC/A. Jubett & Priam David)

The result of this trial project is a new composition based upon and influenced by real data from NASA telescopes, but with a human take.

“In some ways, this is just another way for humans to interact with the night sky just as they have throughout recorded history,” says Arcand. “We are using different tools but the concept of being inspired by the heavens to make art remains the same.”

Kastner hopes to expand this pilot composition project to other objects in Chandra’s data sonification collection. She is also looking to bring in other musical collaborators who are interested in using the data in their pieces.

Sophie Kastner’s Galactic Center piece is entitled “Where Parallel Lines Converge.” If you are a musician who wants to try playing this sonification at home, check out the sheet music at: https://chandra.si.edu/sound/symphony.html.

The piece was recorded by Montreal based Ensemble Éclat conducted by Charles-Eric LaFontaine on July 19, 2023, at McGill University.

NASA’s Marshall Space Flight Center manages the Chandra program. The Smithsonian Astrophysical Observatory’s Chandra X-ray Center controls science operations from Cambridge, Massachusetts, and flight operations from Burlington, Massachusetts.

Read more from NASA’s Chandra X-ray Observatory.

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Dietitian Rachel Brown Speaker for Nov. 28 Marshall Association Event

Rachel Brown, registered dietitian and certified diabetes care and education specialist, will be the guest speaker for the Marshall Association Speaker Series on Nov. 28.

The event will be 12-1 p.m. The event is free to attend and open to everyone via Teams. NASA Marshall Space Flight Center team members can attend in Building 4221, Conference Room 1103. The meeting topic follows this year’s theme of Breaking Boundaries.

Rachel Brown, registered dietitian and certified diabetes care and education specialist, will be the guest speaker for the Marshall Association Speaker Series on Nov. 28.
Rachel Brown, registered dietitian and certified diabetes care and education specialist, will be the guest speaker for the Marshall Association Speaker Series on Nov. 28.
NASA

A mom of two and a Huntsville resident since 2016, Brown is the owner of Rocket City Dietitian social media channels, where she focuses on promoting local food, fun, and fitness available in the Rocket City. She has a monthly TV segment on TN Valley Living promoting the local food scene and is a regular contributor to Huntsville Magazine, We Are Huntsville, and VisitHuntsville.org.

Email the Marshall Association for questions about the event. For more information on the Marshall Association and how to join, team members can visit their page on Inside Marshall.

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Cube Quest Concludes: Wins, Lessons Learned from Centennial Challenge

By Savannah Bullard

Artemis I launched from NASA’s Kennedy Space Center on Nov. 16, 2022, penning a new era of space exploration and inching the agency closer to sending the first woman and first person of color to the lunar surface.

Aboard the Space Launch System (SLS) rocket were 10 small satellites, no bigger than shoeboxes, whose goal was to detach and capably perform operations near and beyond the Moon. One of those satellites was a product of the Cube Quest Challenge, a NASA-led prize competition that asked citizen innovators to design, build, and deliver flight-qualified satellites called CubeSats that could perform its mission independently of the Artemis I mission.

The Orion Stage Adapter for Artemis I sits below as a large circle that has CubeSats secured along the inside yellow part of it.
Small satellites, called CubeSats, are shown secured inside NASA’s Orion stage adapter at NASA’s Kennedy Space Center on Aug. 5, 2021. One of these CubeSats belonged to Team Miles, one of the three finalists in the Cube Quest Centennial Challenge. The ring-shaped stage adapter was connected to the Space Launch System’s Interim Cryogenic Propulsion Stage, with the Orion spacecraft secured on top. The CubeSats’ mission was to detach from the stage adapter, then fly near and beyond the Moon to conduct a variety of science experiments and technology demonstrations to expand our knowledge of the lunar surface during the Artemis I mission.
NASA/Cory Huston

Cube Quest is the agency’s first in-space public prize competition. Opened in 2015, the challenge began with four ground-based tournaments, which awarded almost $500,000 in prizes. Three finalists emerged from the ground competition with a ticket to hitch a ride aboard the SLS as a secondary payload – and win the rest of the competition’s $5 million prize purse, NASA’s largest-ever prize offering to date – in 2022.

Of the three finalists, Team Miles was the sole team to make the trip on Artemis I successfully. Shortly after a successful deployment in space, controllers detected downlink signals and processed them to confirm whether the CubeSat was operational. This remains the latest update for the Team Miles CubeSat.

“We’re still celebrating the many wins that were borne out of Cube Quest,” said Centennial Challenges Program Manager Denise Morris. “The intent of the challenge was to reward citizen inventors who successfully advance the CubeSat technologies needed for operations on the Moon and beyond, and I believe we accomplished this.”

Innovation rarely comes without error, but according to Challenge Manager Naveen Vetcha, who supports Centennial Challenges through Jacobs Space Exploration Group, even after everything goes as expected, there is no guarantee that scientists will reach their desired outcomes.

“Given the magnitude of what we can and do accomplish every day at NASA, it comes with the territory that not every test, proposal, or idea will come out with 100 percent success,” Vetcha said. “We have set ambitious goals, and challenging ourselves to change what’s possible will inevitably end with examples of not meeting our stretch goals. But, with each failure comes more opportunities and lessons to carry forward. In the end, our competitors created technologies that will enable affordable deep space CubeSats, which, to me, is a big win.”

Although Team Miles may have made it furthest in the Cube Quest Challenge, having launched its CubeSat as a secondary payload aboard Artemis I, the team continues to participate in the challenge long after launch.

“From Team Miles, Miles Space LLC was created and is still in business,” said Jan McKenna, Team Miles’ project manager and safety lead. “Miles Space is developing and selling the propulsion system designed for our craft to commercial aerospace companies, and we’ve expanded to be able to create hardware for communications along with our CubeSat developments.”

The next steps for Miles Space LLC include seeing through their active patent applications, establishing relationships with potential clients, and continuing to hunt for a connection with their flying CubeSat. Another finalist team, Cislunar Explorers, is currently focused on using their lessons learned to benefit the global small satellite community.

“I utilized the contacts I made through Cube Quest and the other Artemis Secondary Payloads for my thesis research,” said Aaron Zucherman, Cislunar Explorers’ project manager. “This has enabled me to find partnerships and consulting work with other universities and companies where I have shared my experiences learning the best ways to build interplanetary CubeSats.”

This challenge featured teams from diverse educational and commercial backgrounds. Several team members credited the challenge as a catalyst in their graduate thesis or Ph.D. research, but one young innovator says Cube Quest completely redirected his entire career trajectory.

Project Selene team lead, Braden Oh, competed with his peers at La Cañada High School in La Cañada, California. Oh’s team eventually caught the attention of Kerri Cahoy at the Massachusetts Institute of Technology, and the designs were similar enough that Cahoy invited the two teams to merge. The exposure gained through this partnership was a powerful inspiration for Oh and his peers.

“I originally intended to apply to college as a computer science major, but my experiences in Cube Quest inspired me to study engineering instead,” Oh said. “I saw similar stories unfold for a number of my teammates; one eventually graduated from MIT and another now works for NASA.”

Cube Quest is managed out of NASA’s Ames Research Center. The competition is a part of NASA’s Centennial Challenges, which is housed at the agency’s Marshall Space Flight Center. Centennial Challenges is a part of NASA’s Prizes, Challenges, and Crowdsourcing program in the Space Technology Mission Directorate.

Bullard, a Manufacturing Technical Solutions Inc. employee, supports the Marshall Office of Communications.

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The Heat is On! NASA’s ‘Flawless’ Heat Shield Demo Passes the Test

A little more than a year ago, a NASA flight test article came screaming back from space at more than 18,000 mph, reaching temperatures of nearly 2,700 degrees Fahrenheit before gently splashing down in the Pacific Ocean. At that moment, it became the largest blunt body – a type of reentry vehicle that creates a heat-deflecting shockwave – ever to reenter Earth’s atmosphere.

The Low-Earth Orbit Flight Test of an Inflatable Decelerator, or LOFTID, launched Nov. 10, 2022, aboard a ULA (United Launch Alliance) Atlas V rocket and successfully demonstrated an inflatable heat shield. Also known as a Hypersonic Inflatable Aerodynamic Decelerator, or HIAD, aeroshell, this technology could allow larger spacecraft to safely descend through the atmospheres of celestial bodies like Mars, Venus, and even Saturn’s moon, Titan.

Low-Orbit Flight Test of an Inflatable Decelerator (LOFTID) on a ship deck after reentry after the demo on November 10, 2022.
The Low-Earth Orbit Flight Test of an Inflatable Decelerator, or LOFTID, spacecraft is pictured after its atmospheric re-entry test in November 2022.
NASA/Greg Swanson

“Large-diameter aeroshells allow us to deliver critical support hardware, and potentially even crew, to the surface of planets with atmospheres,” said Trudy Kortes, director of Technology Demonstrations at NASA Headquarters. “This capability is crucial for the nation’s ambition of expanding human and robotic exploration across our solar system.”

NASA has been developing HIAD technologies for over a decade, including two smaller scale suborbital flight tests before LOFTID. In addition to this successful tech demo, NASA is investigating future applications, including partnering with commercial companies to develop technologies for small satellite reentry, aerocapture, and cislunar payloads.

“This was a keystone event for us, and the short answer is: It was highly successful,” said LOFTID Project Manager Joe Del Corso. “Our assessment of LOFTID concluded with the promise of what this technology may do to empower the exploration of deep space.”

Due to the success of the LOFTID tech demo, NASA announced under its Tipping Point program that it would partner with ULA to develop and deliver the “next size up,” a larger 12-meter HIAD aeroshell for recovering the company’s Vulcan engines from low Earth orbit for reuse.

The LOFTID team recently held a post-flight analysis assessment of the flight test at NASA’s Langley Research Center. Their verdict?

Upon recovery, the team discovered LOFTID appeared pristine, with minimal damage, meaning its performance was, as Del Corso puts it, “Just flawless.”

View some interesting visual highlights from LOFTID’s flight test.

LOFTID splashed down in the Pacific Ocean several hundred miles off the east coast of Hawaii and only about eight miles from the recovery ship’s bow – almost exactly as modeled. A crew got on a small boat and retrieved and hoisted LOFTID onto the recovery ship.

“The LOFTID mission was important because it proved the cutting-edge HIAD design functioned successfully at an appropriate scale and in a relevant environment,” said Tawnya Laughinghouse, manager of the TDM (Technology Demonstrations Missions) program office at NASA’s Marshall Space Flight Center.

Marshall supported the Langley-led LOFTID project, providing avionics flight hardware, including the data acquisition system, the inertial measurement unit, and six camera pods. Marshall engineers also performed thermal and fluids analyses and modeling in support of the LOFTID re-entry vehicle inflation system and aeroshell designs.

The LOFTID demonstration was a public private-partnership with ULA funded by STMD and managed by the Technology Demonstration Mission Program, executed by NASA Langley with contributions from across NASA centers. Multiple U.S. small businesses contributed to the hardware. NASA’s Launch Services Program was responsible for NASA’s oversight of launch operations.

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      The animation shows the strength of the turbulent motions of the Sun’s inner layers as materials twist into its atmosphere, resembling a roiling pot of boiling water or a flurry of schooling fish sending material bubbling up to the surface or diving it further down below. 
      “Our simulations use what we call a realistic approach, which means we include as much as we know to-date about solar plasma to reproduce different phenomena observed with NASA space missions,” said Irina Kitiashvili, a scientist at NASA’s Ames Research Center in California’s Silicon Valley who helped lead the study. 
      Using modern computational capabilities, the team was able, for the first time to reproduce the fine structures of the subsurface layer observed with NASA’s Solar Dynamics Observatory.
      “Right now, we don’t have the computational capabilities to create realistic global models of the entire Sun due to the complexity,” said Kitiashvili. “Therefore, we create models of smaller areas or layers, which can show us structures of the solar surface and atmosphere – like shock waves or tornado-like features measuring only a few miles in size; that’s much finer detail than any one spacecraft can resolve.”
      Scientists seek to better understand the Sun and what phenomena drive the patterns of its activity. The connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, climate, radiation belts, auroras and many other phenomena. Space weather predictions are critical for exploration of space, supporting the spacecraft and astronauts of NASA’s Artemis campaign. Surveying this space environment is a vital part of understanding and mitigating astronaut exposure to space radiation and keeping our spacecraft and instruments safe.
      This has been a big year for our special star, studded with events like the annular eclipse, a total eclipse, and the Sun reaching its solar maximum period. In December 2024, NASA’s Parker Solar Probe mission – which is helping researchers to understand space weather right at the source – will make its closest-ever approach to the Sun and beat its own record of being the closest human-made object to reach the Sun. 
      The Sun keeps surprising us. We are looking forward to seeing what kind of exciting events will be organized by the Sun."
      Irina Kitiashvili
      NASA Scientist
      “The Sun keeps surprising us,” said Kitiashvili. “We are looking forward to seeing what kind of exciting events will be organized by the Sun.”
      These simulations were run on the Pleaides supercomputer at the NASA Advanced Supercomputing facility at NASA Ames over several weeks of runtime, generating terabytes of data. 
      NASA is showcasing 29 of the agency’s computational achievements at SC24, the international supercomputing conference, Nov. 17-22, 2023, in Atlanta, Georgia. For more technical information, visit: ​
      https://www.nas.nasa.gov/sc24
      For news media: Members of the news media interested in covering this topic should reach out to the NASA Ames newsroom.
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      Last Updated Nov 21, 2024 Related Terms
      General Ames Research Center Heliophysics Solar Dynamics Observatory (SDO) Sunspots The Sun Explore More
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    • By NASA
      Hubble Space Telescope Home NASA’s Hubble Finds… Hubble Space Telescope Hubble Home Overview About Hubble The History of Hubble Hubble Timeline Why Have a Telescope in Space? Hubble by the Numbers At the Museum FAQs Impact & Benefits Hubble’s Impact & Benefits Science Impacts Cultural Impact Technology Benefits Impact on Human Spaceflight Astro Community Impacts Science Hubble Science Science Themes Science Highlights Science Behind Discoveries Hubble’s Partners in Science Universe Uncovered Explore the Night Sky Observatory Hubble Observatory Hubble Design Mission Operations Missions to Hubble Hubble vs Webb Team Hubble Team Career Aspirations Hubble Astronauts News Hubble News Hubble News Archive Social Media Media Resources Multimedia Multimedia Images Videos Sonifications Podcasts E-books Lithographs Fact Sheets Glossary Posters Hubble on the NASA App More Online Activities   5 Min Read NASA’s Hubble Finds Sizzling Details About Young Star FU Orionis
      An artist’s concept of the early stages of the young star FU Orionis (FU Ori) outburst, surrounded by a disk of material. Credits:
      NASA-JPL, Caltech In 1936, astronomers saw a puzzling event in the constellation Orion: the young star FU Orionis (FU Ori) became a hundred times brighter in a matter of months. At its peak, FU Ori was intrinsically 100 times brighter than our Sun. Unlike an exploding star though, it has declined in luminosity only languidly since then.
      Now, a team of astronomers has wielded NASA’s Hubble Space Telescope‘s ultraviolet capabilities to learn more about the interaction between FU Ori’s stellar surface and the accretion disk that has been dumping gas onto the growing star for nearly 90 years. They find that the inner disk touching the star is extraordinarily hot — which challenges conventional wisdom.
      The observations were made with the telescope’s COS (Cosmic Origins Spectrograph) and STIS (Space Telescope Imaging Spectrograph) instruments. The data includes the first far-ultraviolet and new near-ultraviolet spectra of FU Ori.
      “We were hoping to validate the hottest part of the accretion disk model, to determine its maximum temperature, by measuring closer to the inner edge of the accretion disk than ever before,” said Lynne Hillenbrand of Caltech in Pasadena, California, and a co-author of the paper. “I think there was some hope that we would see something extra, like the interface between the star and its disk, but we were certainly not expecting it. The fact we saw so much extra — it was much brighter in the ultraviolet than we predicted — that was the big surprise.”
      A Better Understanding of Stellar Accretion
      Originally deemed to be a unique case among stars, FU Ori exemplifies a class of young, eruptive stars that undergo dramatic changes in brightness. These objects are a subset of classical T Tauri stars, which are newly forming stars that are building up by accreting material from their disk and the surrounding nebula. In classical T Tauri stars, the disk does not touch the star directly because it is restricted by the outward pressure of the star’s magnetic field.
      The accretion disks around FU Ori objects, however, are susceptible to instabilities due to their enormous mass relative to the central star, interactions with a binary companion, or infalling material. Such instability means the mass accretion rate can change dramatically. The increased pace disrupts the delicate balance between the stellar magnetic field and the inner edge of the disk, leading to material moving closer in and eventually touching the star’s surface.
      This is an artist’s concept of the early stages of the young star FU Orionis (FU Ori) outburst, surrounded by a disk of material. A team of astronomers has used the Hubble Space Telescope’s ultraviolet capabilities to learn more about the interaction between FU Ori’s stellar surface and the accretion disk that has been dumping gas onto the growing star for nearly 90 years. They found that the inner disk, touching the star, is much hotter than expected—16,000 kelvins—nearly three times our Sun’s surface temperature. That sizzling temperature is nearly twice as hot as previously believed. NASA-JPL, Caltech
      Download this image

      The enhanced infall rate and proximity of the accretion disk to the star make FU Ori objects much brighter than a typical T Tauri star. In fact, during an outburst, the star itself is outshined by the disk. Furthermore, the disk material is orbiting rapidly as it approaches the star, much faster than the rotation rate of the stellar surface. This means that there should be a region where the disk impacts the star and the material slows down and heats up significantly. 
      “The Hubble data indicates a much hotter impact region than models have previously predicted,” said Adolfo Carvalho of Caltech and lead author of the study. “In FU Ori, the temperature is 16,000 kelvins [nearly three times our Sun’s surface temperature]. That sizzling temperature is almost twice the amount prior models have calculated. It challenges and encourages us to think of how such a jump in temperature can be explained.”
      To address the significant difference in temperature between past models and the recent Hubble observations, the team offers a revised interpretation of the geometry within FU Ori’s inner region: The accretion disk’s material approaches the star and once it reaches the stellar surface, a hot shock is produced, which emits a lot of ultraviolet light.
      Planet Survival Around FU Ori
      Understanding the mechanisms of FU Ori’s rapid accretion process relates more broadly to ideas of planet formation and survival.
      “Our revised model based on the Hubble data is not strictly bad news for planet evolution, it’s sort of a mixed bag,” explained Carvalho. “If the planet is far out in the disk as it’s forming, outbursts from an FU Ori object should influence what kind of chemicals the planet will ultimately inherit. But if a forming planet is very close to the star, then it’s a slightly different story. Within a couple outbursts, any planets that are forming very close to the star can rapidly move inward and eventually merge with it. You could lose, or at least completely fry, rocky planets forming close to such a star.”
      Additional work with the Hubble UV observations is in progress. The team is carefully analyzing the various spectral emission lines from multiple elements present in the COS spectrum. This should provide further clues on FU Ori’s environment, such as the kinematics of inflowing and outflowing gas within the inner region.
      “A lot of these young stars are spectroscopically very rich at far ultraviolet wavelengths,” reflected Hillenbrand. “A combination of Hubble, its size and wavelength coverage, as well as FU Ori’s fortunate circumstances, let us see further down into the engine of this fascinating star-type than ever before.”
      These findings have been published in The Astrophysical Journal Letters.
      The observations were taken as part of General Observer program 17176.
      The Hubble Space Telescope has been operating for over three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
      Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contacts:
      Claire Andreoli (claire.andreoli@nasa.gov)
      NASA’s Goddard Space Flight Center, Greenbelt, MD
      Abigail Major, Ray Villard
      Space Telescope Science Institute, Baltimore, MD
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      Last Updated Nov 21, 2024 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Astrophysics Astrophysics Division Goddard Space Flight Center Hubble Space Telescope Stars Keep Exploring Discover More Topics From Hubble
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