Members Can Post Anonymously On This Site
-
Similar Topics
-
By NASA
Continuing his engagement to deepen international collaboration and promote the peaceful use of space, NASA Administrator Bill Nelson will travel to Lima on Wednesday.
Nelson will meet with Maj. Gen. Roberto Melgar Sheen, director of Peru’s National Commission for Aerospace Research and Development (CONIDA) Thursday, Nov. 14, and sign a non-binding memorandum of understanding to enhance space cooperation. The memorandum of understanding between NASA and CONIDA will include safety training, a joint feasibility study for a potential sounding rockets campaign, and technical assistance for CONIDA on sounding rocket launches.
Nelson will discuss the importance of international partnerships and collaboration in space and celebrate Peru’s signing of the Artemis Accords earlier this year.
For more information about NASA’s international partnerships, visit:
https://www.nasa.gov/oiir
-end-
Meira Bernstein
Headquarters, Washington
202-615-1747
meira.b.bernstein@nasa.gov
Share
Details
Last Updated Nov 13, 2024 LocationNASA Headquarters Related Terms
Office of International and Interagency Relations (OIIR) Bill Nelson View the full article
-
By NASA
This illustration shows a red, early-universe dwarf galaxy that hosts a rapidly feeding black hole at its center. Using data from NASA’s James Webb Space Telescope and Chandra X-ray Observatory, a team of astronomers have discovered this low-mass supermassive black hole at the center of a galaxy just 1.5 billion years after the Big Bang. It is pulling in matter at a phenomenal rate — over 40 times the theoretical limit. While short lived, this black hole’s “feast” could help astronomers explain how supermassive black holes grew so quickly in the early universe.NOIRLab/NSF/AURA/J. da Silva/M. Zamani A rapidly feeding black hole at the center of a dwarf galaxy in the early universe, shown in this artist’s concept, may hold important clues to the evolution of supermassive black holes in general.
Using data from NASA’s James Webb Space Telescope and Chandra X-ray Observatory, a team of astronomers discovered this low-mass supermassive black hole just 1.5 billion years after the big bang. The black hole is pulling in matter at a phenomenal rate — over 40 times the theoretical limit. While short lived, this black hole’s “feast” could help astronomers explain how supermassive black holes grew so quickly in the early universe.
Supermassive black holes exist at the center of most galaxies, and modern telescopes continue to observe them at surprisingly early times in the universe’s evolution. It’s difficult to understand how these black holes were able to grow so big so rapidly. But with the discovery of a low-mass supermassive black hole feasting on material at an extreme rate so soon after the birth of the universe, astronomers now have valuable new insights into the mechanisms of rapidly growing black holes in the early universe.
The black hole, called LID-568, was hidden among thousands of objects in the Chandra X-ray Observatory’s COSMOS legacy survey, a catalog resulting from some 4.6 million Chandra observations. This population of galaxies is very bright in the X-ray light, but invisible in optical and previous near-infrared observations. By following up with Webb, astronomers could use the observatory’s unique infrared sensitivity to detect these faint counterpart emissions, which led to the discovery of the black hole.
The speed and size of these outflows led the team to infer that a substantial fraction of the mass growth of LID-568 may have occurred in a single episode of rapid accretion.
LID-568 appears to be feeding on matter at a rate 40 times its Eddington limit. This limit relates to the maximum amount of light that material surrounding a black hole can emit, as well as how fast it can absorb matter, such that its inward gravitational force and outward pressure generated from the heat of the compressed, infalling matter remain in balance.
These results provide new insights into the formation of supermassive black holes from smaller black hole “seeds,” which current theories suggest arise either from the death of the universe’s first stars (light seeds) or the direct collapse of gas clouds (heavy seeds). Until now, these theories lacked observational confirmation.
The new discovery suggests that “a significant portion of mass growth can occur during a single episode of rapid feeding, regardless of whether the black hole originated from a light or heavy seed,” said International Gemini Observatory/NSF NOIRLab astronomer Hyewon Suh, who led the research team.
A paper describing these results (“A super-Eddington-accreting black hole ~1.5 Gyr after the Big Bang observed with JWST”) appears in the journal Nature Astronomy.
About the Missions
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.
The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).
Read more from NASA’s Chandra X-ray Observatory.
Learn more about the Chandra X-ray Observatory and its mission here:
https://www.nasa.gov/chandra
https://chandra.si.edu
News Media Contact
Elizabeth Laundau
NASA Headquarters
Washington, DC
202-923-0167
elizabeth.r.landau@nasa.gov
Lane Figueroa
Marshall Space Flight Center, Huntsville, Alabama
256-544-0034
lane.e.figueroa@nasa.gov
View the full article
-
By NASA
Credit: NASA Following a signing ceremony Wednesday in Denmark’s capital city, Copenhagen, NASA embraced Denmark as the 48th nation to commit to the safe and responsible exploration of space that benefits humanity.
“We welcome Denmark’s signing of the Artemis Accords today,” said NASA Administrator Bill Nelson. “Denmark, as a founding member of the European Space Agency (ESA), has contributed to space exploration for decades, including collaborating with NASA on Mars exploration. Denmark’s signing of the Artemis Accords will further international cooperation and the peaceful exploration of space.”
Christina Egelund, minister of higher education and science, signed the Artemis Accords on behalf of Denmark. Alan Leventhal, U.S. ambassador to the Kingdom of Denmark also participated in the ceremony, and Nelson contributed recorded remarks.
“With the Artemis program, the United States is leading the way back to the moon, and Denmark wants to strengthen the strategic partnership with the United States and other partners for the benefit of both science and industry,” said Egelund. “The signing of the Accords is in line with the Danish government’s upcoming strategy for space research and innovation. As part of the strategy, Denmark seeks to strengthen ties with our allies such as the United States. Space holds great potential, and we want – in cooperation with other countries – to advance scientific breakthroughs and influence the development and use of the space sector in the future.”
In 2020, the United States, led by NASA and the U.S. Department of State, and seven other initial signatory nations established the Artemis Accords, identifying a set of principles promoting the beneficial use of space for humanity. The Artemis Accords are grounded in the Outer Space Treaty and other agreements including the Registration Convention, the Rescue and Return Agreement, as well as best practices and norms of responsible behavior that NASA and its partners have supported, including the public release of scientific data.
The commitments to the Artemis Accords and efforts by the signatories to advance implementation of these principles support the safe and sustainable exploration of space.
Learn more about the Artemis Accords at:
https://www.nasa.gov/artemis-accords
-end-
Meira Bernstein / Elizabeth Shaw
Headquarters, Washington
202-358-1600
meira.b.bernstein@nasa.gov / elizabeth.a.shaw@nasa.gov
Share
Details
Last Updated Nov 13, 2024 LocationNASA Headquarters Related Terms
Artemis Accords Office of International and Interagency Relations (OIIR) View the full article
-
By NASA
4 min read
NASA’s Swift Studies Gas-Churning Monster Black Holes
A pair of monster black holes swirl in a cloud of gas in this artist’s concept of AT 2021hdr, a recurring outburst studied by NASA’s Neil Gehrels Swift Observatory and the Zwicky Transient Facility at Palomar Observatory in California. NASA/Aurore Simonnet (Sonoma State University) Scientists using observations from NASA’s Neil Gehrels Swift Observatory have discovered, for the first time, the signal from a pair of monster black holes disrupting a cloud of gas in the center of a galaxy.
“It’s a very weird event, called AT 2021hdr, that keeps recurring every few months,” said Lorena Hernández-García, an astrophysicist at the Millennium Institute of Astrophysics, the Millennium Nucleus on Transversal Research and Technology to Explore Supermassive Black Holes, and University of Valparaíso in Chile. “We think that a gas cloud engulfed the black holes. As they orbit each other, the black holes interact with the cloud, perturbing and consuming its gas. This produces an oscillating pattern in the light from the system.”
A paper about AT 2021hdr, led by Hernández-García, was published Nov. 13 in the journal Astronomy and Astrophysics.
The dual black holes are in the center of a galaxy called 2MASX J21240027+3409114, located 1 billion light-years away in the northern constellation Cygnus. The pair are about 16 billion miles (26 billion kilometers) apart, close enough that light only takes a day to travel between them. Together they contain 40 million times the Sun’s mass.
Scientists estimate the black holes complete an orbit every 130 days and will collide and merge in approximately 70,000 years.
AT 2021hdr was first spotted in March 2021 by the Caltech-led ZTF (Zwicky Transient Facility) at the Palomar Observatory in California. It was flagged as a potentially interesting source by ALeRCE (Automatic Learning for the Rapid Classification of Events). This multidisciplinary team combines artificial intelligence tools with human expertise to report events in the night sky to the astronomical community using the mountains of data collected by survey programs like ZTF.
“Although this flare was originally thought to be a supernova, outbursts in 2022 made us think of other explanations,” said co-author Alejandra Muñoz-Arancibia, an ALeRCE team member and astrophysicist at the Millennium Institute of Astrophysics and the Center for Mathematical Modeling at the University of Chile. “Each subsequent event has helped us refine our model of what’s going on in the system.”
Since the first flare, ZTF has detected outbursts from AT 2021hdr every 60 to 90 days.
Hernández-García and her team have been observing the source with Swift since November 2022. Swift helped them determine that the binary produces oscillations in ultraviolet and X-ray light on the same time scales as ZTF sees them in the visible range.
The researchers conducted a Goldilocks-type elimination of different models to explain what they saw in the data.
Initially, they thought the signal could be the byproduct of normal activity in the galactic center. Then they considered whether a tidal disruption event — the destruction of a star that wandered too close to one of the black holes — could be the cause.
Finally, they settled on another possibility, the tidal disruption of a gas cloud, one that was bigger than the binary itself. When the cloud encountered the black holes, gravity ripped it apart, forming filaments around the pair, and friction started to heat it. The gas got particularly dense and hot close to the black holes. As the binary orbits, the complex interplay of forces ejects some of the gas from the system on each rotation. These interactions produce the fluctuating light Swift and ZTF observe.
To view this video please enable JavaScript, and consider upgrading to a web browser that
supports HTML5 video
Watch as a gas cloud encounters two supermassive black holes in this simulation. The complex interplay of gravitational and frictional forces causes the cloud to condense and heat. Some of the gas is ejected from the system with each orbit of the black holes. F. Goicovic et al. 2016 Hernández-García and her team plan to continue observations of AT 2021hdr to better understand the system and improve their models. They’re also interested in studying its home galaxy, which is currently merging with another one nearby — an event first reported in their paper.
“As Swift approaches its 20th anniversary, it’s incredible to see all the new science it’s still helping the community accomplish,” said S. Bradley Cenko, Swift’s principal investigator at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “There’s still so much it has left to teach us about our ever-changing cosmos.”
NASA’s missions are part of a growing, worldwide network watching for changes in the sky to solve mysteries of how the universe works.
Goddard manages the Swift mission in collaboration with Penn State, the Los Alamos National Laboratory in New Mexico, and Northrop Grumman Space Systems in Dulles, Virginia. Other partners include the University of Leicester and Mullard Space Science Laboratory in the United Kingdom, Brera Observatory in Italy, and the Italian Space Agency.
Download high-resolution images and videos.
By Jeanette Kazmierczak
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Media Contact:
Claire Andreoli
301-286-1940
claire.andreoli@nasa.gov
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Facebook logo @NASAUniverse @NASAUniverse Instagram logo @NASAUniverse Share
Details
Last Updated Nov 13, 2024 Editor Jeanette Kazmierczak Related Terms
Astrophysics Black Holes Galaxies, Stars, & Black Holes Galaxies, Stars, & Black Holes Research Goddard Space Flight Center Neil Gehrels Swift Observatory Science & Research Supermassive Black Holes The Universe View the full article
-
By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Note: The following article is part of a series highlighting propulsion testing at NASA’s Stennis Space Center. To access the entire series, please visit: https://www.nasa.gov/feature/propulsion-powering-space-dreams/.
NASA engineers conduct a test of the liquid oxygen/liquid methane Morpheus lander engine HD4B on the E-3 Test Stand at NASA’s Stennis Space Center during the week of Sept. 9, 2013. The fourth-generation Project Morpheus engine was a prototype vertical takeoff and landing vehicle designed to advance innovative technologies into flight-proven systems that may be incorporated into future human exploration missions. NASA/Stennis The work of NASA has fueled commercial spaceflight for takeoff – and for many aerospace companies, the road to launch begins at NASA’s Stennis Space Center near Bay St. Louis, Mississippi.
Already the nation’s largest propulsion test site and a leader in working with aerospace companies to support their testing needs, NASA Stennis aims to continue growing its commercial market even further.
“The aerospace industry is expanding rapidly, and we are here to support it,” said NASA Stennis Director John Bailey. “NASA Stennis has proven for more than two decades that we have the versatile infrastructure and reliable propulsion test experts to meet testing needs and accelerate space goals for a whole range of customers.”
The central hub for meeting those needs at the south Mississippi center is the E Test Complex. It features four stands with 12 test cells capable of supporting a range of component and engine test activities. NASA operates the E-1 Test Stand with four cell positions and the E-3 Test Stand with two cells. Relativity Space, based in Long Beach, California, leases the E-2 and E-4 stands to support some of its test operations.
Operators conduct a hot fire for Relativity Space’s Aeon R thrust chamber assembly on the E-1 Test Stand at NASA’s Stennis Space Center in 2024. NASA/Stennis Virgin Orbit, a satellite-launch company, conducts a Thrust Chamber Assembly test on the E-1 Test Stand at NASA’s Stennis Space Center in 2021. The company partnered with NASA Stennis to conduct hot fire tests totaling a cumulative 974.391 seconds.NASA/Stennis Launcher’s 3D-printed Engine-2 rocket engine completes a 5-second hot fire of its thrust chamber assembly on Aug. 20, 2021, at NASA’s Stennis Space Center. The company was just one of several conducting test projects on site in 2021. Launcher, Virgin Orbit, Relativity Space, and L3Harris (formerly known as Aerojet Rocketdyne) made significant strides toward their space-project goals while utilizing NASA Stennis infrastructure.Launcher/John Kraus Photography An image from November 2021 shows a subscale center body diffuser hot fire on the E-3 Test Stand during an ongoing advanced diffuser test series at NASA’s Stennis Space Center. NASA/Stennis A team of engineers from NASA, Orbital Sciences Corporation and L3Harris (formerly known as Aerojet Rocketdyne) conduct an engine acceptance test on the E-1 Test Stand at NASA’s Stennis Space Center on Jan. 18, 2013. The successful test of AJ26 Engine E12 continued support of Orbital Sciences Corporation as the company prepared to provide commercial cargo missions to the International Space Station. NASA/Stennis Developed during the 1990s and early 2000s, the E Test Complex can deliver various propellants and gases at high and low pressures and flow rates not available elsewhere. The versatility of the complex infrastructure and test team allows it to support projects for commercial aerospace companies, large and small. NASA Stennis also provides welding, machining, calibration, precision cleaning, and other support services required to conduct testing.
“NASA Stennis delivers exceptional results in a timely manner with our capabilities and services,” said Duane Armstrong, manager of the NASA Stennis Strategic Business Development Office. “Our commercial partnerships and agreements have proven to be true win-win arrangements. NASA Stennis is where customers have access to unique NASA test support infrastructure and expertise, making it the go-to place for commercial propulsion testing.”
Companies come to the south Mississippi site with various needs. Some test for a short time and collect essential data. Others stay for an extended period. The stage of development and the particular test article, whether a component or full engine, determine where testing takes place within the E Complex.
NASA Stennis also offers a variety of test agreements. Companies may lease a stand or area and perform its own test campaign. They also may team with NASA Stennis engineers and operators to form a blended test team. And in some cases, companies will turn over the entirety of test work to the NASA Stennis team. Current companies conducting work at NASA Stennis include: Blue Origin; Boeing; Evolution Space; Launcher, a Vast company; Relativity Space; and Rolls-Royce. They join a growing list who conducted earlier test projects in the complex, including SpaceX, Stratolaunch, Virgin Orbit, and Orbital Sciences Corporation.
In addition, three companies – Relativity Space, Rocket Lab, and Evolution Space – are establishing production and/or test operations onsite.
“We may work with a customer brand new to the field, so we help them figure out how to build their engine,” said Chris Barnett-Woods, E-1 electrical lead and instrumentation engineer. “Another customer may know exactly what they want, and we support them to make it happen. We focus on customer need. Given our expertise, we know how testing needs to be conducted or can figure it out quickly together, which can help our customer save money toward a successful outcome.”
NASA engineers conduct a test of a methane-fueled 2K thruster on the E-3 Test Stand at NASA’s Stennis Space Center during a four-day span in May 2015. NASA/Stennis NASA records a historic week Nov. 5-9, 2012, conducting 27 tests on three different rocket engines/components across three stands in the E Test Complex at NASA’s Stennis Space Center. Inset images show the types of tests conducted on the E-1 Test Stand (right), the E-2 Test Stand (left) and the E-3 Test Stand (center). The E-1 image is from an October 2012 test and is provided courtesy of Blue Origin. Other images are from tests conducted the week of Nov. 5, 2012. NASA/Stennis Operators at the E-2 Test Stand at NASA’s Stennis Space Center conduct a test of the oxygen preburner component developed by SpaceX for its Raptor rocket engine on June 9, 2015. NASA/Stennis Operators conduct a hot fire on the E-3 Test Stand during ongoing advanced diffuser test series in October 2015 at NASA’s Stennis Space Center. Subscale testing was conducted at NASA Stennis to validate innovative new diffuser designs to help test rocket engines at simulated high altitudes, helping to ensure the engines will fire and operate on deep space missions as needed. NASA/Stennis NASA’s Stennis Space Center and L3Harris (formerly known as Aerojet Rocketdyne) complete a successful round of AR1 preburner tests on Cell 2 of the E-1 Test Stand during the last week of June 2016. The tests successfully verified key preburner injector design parameters for the company’s AR1 engine being designed to end use of Russian engines for national security space launches. NASA/Stennis Capabilities to benefit NASA and the aerospace industry have grown since the center entered its first commercial partnership in the late 1990s. The test team also has grown in understanding the commercial approach, and the center has committed itself to adapting and streamlining its business processes.
“Time-to-market is key for commercial companies,” said Joe Schuyler, director of the NASA Stennis Engineering and Test Directorate. “They want to test as efficiently and economically as possible. Our goal is to meet them where they are and deliver what they need. And that is exactly what we focus our efforts on.”
As stated in the site’s latest strategic plan, the goal is to operate as “a multi-user propulsion testing enterprise that accelerates the development of aerospace systems and services by government and industry.” To that end, the site is innovating its operations, modernizing its services, and demonstrating it is the best choice for propulsion testing.
“NASA Stennis is open for business as the preferred propulsion provider for aerospace companies,” Bailey said. “Companies across the board are realizing they can achieve their desired results at NASA Stennis.”
For information about NASA’s Stennis Space Center, visit:
Stennis Space Center – NASA
Share
Details
Last Updated Nov 13, 2024 EditorNASA Stennis CommunicationsContactC. Lacy Thompsoncalvin.l.thompson@nasa.gov / (228) 688-3333LocationStennis Space Center Related Terms
Stennis Space Center Explore More
4 min read NASA Stennis Propulsion Testing Contributes to Artemis Missions
Article 14 mins ago 5 min read NASA Stennis Test Team Supports Space Dreams with Proven Expertise
Article 14 mins ago 5 min read NASA Stennis Adapts with Purpose to Power Nation’s Space Dreams
Article 14 mins ago Keep Exploring Discover Related Stennis Topics
Propulsion Test Engineering
NASA Stennis Front Door
Multi-User Test Complex
Doing Business with NASA Stennis
View the full article
-
-
Check out these Videos
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.