Jump to content

Spirals in Dust Around Young Stars May Betray Presence of Massive Planets


Recommended Posts

Posted
low_keystone.png

A team of astronomers is proposing that huge spiral patterns seen around some newborn stars, merely a few million years old (about one percent our sun's age), may be evidence for the presence of giant, unseen planets. This idea not only opens the door to a new method of planet detection, but also could offer a look into the early formative years of planet birth. Though astronomers have cataloged thousands of planets orbiting other stars, the very earliest stages of planet formation are elusive because nascent planets are born and embedded inside vast, pancake-shaped disks of dust and gas encircling newborn stars. The conclusion that planets may betray their presence by modifying circumstellar disks on large scales is based on detailed computer modeling of how gas-and-dust disks evolve around newborn stars.

View the full article

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.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By NASA
      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      Regolith Adherence Characterization, or RAC, is one of 10 science and technology instruments flying on NASA’s next Commercial Lunar Payload Services (CLPS) flight as part of the Blue Ghost Misison-1. Developed by Aegis Aerospace of Webster, Texas, RAC is designed to study how lunar dust reacts to more than a dozen different types of material samples, located on the payload’s wheels. Photo courtesy Firefly Aerospace The Moon may look like barren rock, but it’s actually covered in a layer of gravel, pebbles, and dust collectively known as “lunar regolith.” During the Apollo Moon missions, astronauts learned firsthand that the fine, powdery dust – electromagnetically charged due to constant bombardment by solar and cosmic particles – is extremely abrasive and clings to everything: gloves, boots, vehicles, and mechanical equipment. What challenges does that dust pose to future Artemis-era missions to establish long-term outposts on the lunar surface?
      That’s the task of an innovative science instrument called RAC-1 (Regolith Adherence Characterization), one of 10 NASA payloads flying aboard the next delivery for the agency’s CLPS (Commercial Lunar Payload Services) initiative and set to be carried to the surface by Firefly Aerospace’s Blue Ghost 1 lunar lander.
      Developed by Aegis Aerospace of Webster, Texas, RAC will expose 15 sample materials – fabrics, paint coatings, optical systems, sensors, solar cells, and more – to the lunar environment to determine how tenaciously the lunar dust sticks to each one. The instrument will measure accumulation rates during landing and subsequent routine lander operations, aiding identification of those materials which best repel or shed dust. The data will help NASA and its industry partners more effectively test, upgrade, and protect spacecraft, spacesuits, habitats, and equipment in preparation for continued exploration of the Moon under the Artemis campaign.
      “Lunar regolith is a sticky challenge for long-duration expeditions to the surface,” said Dennis Harris, who manages the RAC payload for NASA’s CLPS initiative at the agency’s Marshall Space Flight Center in Huntsville, Alabama. “Dust gets into gears, sticks to spacesuits, and can block optical properties. RAC will help determine the best materials and fabrics with which to build, delivering more robust, durable hardware, products, and equipment.”
      Under the CLPS model, NASA is investing in commercial delivery services to the Moon to enable industry growth and support long-term lunar exploration. As a primary customer for CLPS deliveries, NASA aims to be one of many customers on future flights. NASA’s Marshall Space Flight Center in Huntsville, Alabama, manages the development of seven of the 10 CLPS payloads carried on Firefly’s Blue Ghost lunar lander.
      Learn more about. CLPS and Artemis at:
      https://www.nasa.gov/clps
      Alise Fisher
      Headquarters, Washington
      202-358-2546
      Alise.m.fisher@nasa.gov
      Headquarters, Washington
      202-358-2546
      Alise.m.fisher@nasa.gov
      Corinne Beckinger 
      Marshall Space Flight Center, Huntsville, Ala. 
      256-544-0034  
      corinne.m.beckinger@nasa.gov 
      Share
      Details
      Last Updated Dec 20, 2024 EditorBeth RidgewayContactCorinne M. Beckingercorinne.m.beckinger@nasa.govLocationMarshall Space Flight Center Related Terms
      Commercial Lunar Payload Services (CLPS) Artemis Marshall Space Flight Center Explore More
      3 min read NASA Payload Aims to Probe Moon’s Depths to Study Heat Flow
      Article 2 days ago 4 min read NASA Technology Helps Guard Against Lunar Dust
      Article 8 months ago 4 min read NASA Collects First Surface Science in Decades via Commercial Moon Mission
      Article 10 months ago Keep Exploring Discover Related Topics
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
    • By NASA
      NASA’s Glenn Research Center leaders stand with Evening With the Stars presenters. Left to right: Tim Smith, Nikki Welch, Center Director Dr. Jimmy Kenyon, Acting Deputy Director Dr. Wanda Peters, and Carlos Garcia-Galan. Credit: NASA/Jef Janis  NASA Glenn Research Center’s “An Evening With the Stars” showcased research and technology innovations that addressed this year’s theme, NASA Glenn’s Spotlight on the Stars: 10 Years and Counting. The event featured presentations from Glenn subject matter experts and a networking reception. 
      Held at Windows on the River near Cleveland’s historic waterfront on Nov. 20, the event attracted sponsors and guests from more than 50 companies, universities, and organizations eager to learn more about the center’s recent accomplishments.  
      Special guests Dennis Andersh, CEO and president of Parallax Advanced Research/Ohio Aerospace Institute; Terrence Slaybaugh, vice president of Sites and Infrastructure for JobsOhio; and Dr. Wanda Peters, NASA Glenn’s acting deputy  director, provided remarks. 
      Center Director Dr. Jimmy Kenyon took the stage to welcome visitors and share some accomplishments from an exciting year at NASA Glenn. Kenyon then introduced the presenters – NASA’s stars of the evening – and their topics. 
      “I relish this evening each year because it spotlights what is most important to our success at NASA: our people,” Kenyon said.  

      Nikki Welch is the digital manager in the Office of Communications. In this role, she helps to tell the NASA Glenn story in engaging ways for Glenn’s hundreds of thousands of followers on social media. Welch shared details about her efforts and the importance of “Connecting People to the Mission.”  
      NASA Glenn Research Center’s Nikki Welch talks about connecting people to the NASA mission through storytelling. Credit: NASA/Jef Janis  Tim Smith leads high-temperature alloy development at NASA Glenn and has led research that resulted in over a dozen research licenses and four commercial licenses. As one of the inventors of the metal alloy GRX-810, Smith shared information about Glenn’s “Super Alloy Achievements.” 
      NASA Glenn Research Center’s Tim Smith talks about NASA’s superalloy achievements. Credit: NASA/Jef Janis  Carlos Garcia-Galan is the manager of the Orion program’s European Service Module Integration Office. This module, being provided by ESA (European Space Agency), is Orion’s powerhouse. Garcia-Galan shared information on the topic “Dreaming of Going to the Moon.”  

      NASA Glenn Research Center’s Carlos Garcia-Galan talks about the spacecraft that will bring humanity back to the Moon. Credit: NASA/Jef Janis  Return to Newsletter Explore More
      1 min read Program Manager at NASA Glenn Earns AIAA Sustained Service Award 
      Article 9 mins ago 1 min read NASA Glenn’s Office of Communications Earns Top Honors 
      Article 9 mins ago 10 min read 55 Years Ago: Apollo 13, Preparations for the Third Moon Landing
      Article 2 hours ago View the full article
    • By NASA
      The NASA Ames Science Directorate recognizes the outstanding contributions of (pictured left to right) Maurice Valdez, Niki Parenteau, Dori Myer, and Judy Alfter. Their commitment to the NASA mission represents the entrepreneurial spirit, technical expertise, and collaborative disposition needed to explore this world and beyond.
      Space Science and Astrobiology Star: Maurice Valdez
      Maurice Valdez is a system administrator, supporting desktop systems and website development for the Space Science and Astrobiology Division. Maurice is recognized for his focus and commitment to supporting the division’s scientific productivity by keeping systems compliant and functioning. His can-do attitude makes him instrumental in the success of the team, whether he is finding new solutions for hybrid meetings, fixing equipment, patching systems, or troubleshooting issues.

      Photo credit: Pacific Science Center Space Science and Astrobiology Star: Niki Parenteau
      Niki Parenteau, a research scientist for the Exobiology Branch, embodies the true spirit of an interdisciplinary astrobiologist. She has applied her expertise to identify potential biosignatures of life on exoplanets and has taken a leading role in the project office for the development of the Habitable Worlds Observatory (HWO), where she facilitates collaborative efforts of Ames scientists across the division and shepherds the larger scientific community to enable observations of biosignatures with HWO.

      Space Biosciences Star: Dori Myer
      Archivist Dori Myer has made an outstanding contribution in the Flight Systems Implementation Branch’s multi-year effort to digitize and preserve institutional knowledge.  Under her guidance, the records management team digitized tens of thousands of historical records, preserving the branch’s institutional knowledge for years to come. Her exceptional initiative and dedication have transformed our record management processes, ensuring the accessibility of NASA’s rich institutional knowledge while streamlining its access in the modern age.

      Earth Science Star: Judy Alfter
      Judy Alfter, a Deputy Project Manager in the Earth Science Project Office (ESPO), has excelled in her multi-faceted role during the field campaign for the Plankton, Aerosol, Cloud, ocean Ecosystem Post-launch Airborne eXperiment (PACE-PAX). Judy launched the deployment phase of PACE-PAX, leading the effort to set up Twin Otter flight operations at Marina Municipal Airport in California. Following this phase, she transitioned to Santa Barbara in California to support the mobilization of PACE-PAX ship operations and concluded deployment activities at NASA Armstrong Flight Research Center’s main campus as ESPO site manager for ER-2 flight operations.
      View the full article
    • By NASA
      Caption: An artist’s concept of the International Space Station orbiting Earth. In the distance is the Moon, and a red star representing Mars.Credit: NASA As part of the agency’s efforts to enable broader use of space, NASA has released its final goals and objectives for low Earth orbit, defining the long-term approach toward advancing microgravity science, technology, and exploration for the benefit of all. Developed with input from a wide range of stakeholders, NASA’s Low Earth Orbit Microgravity Strategy will guide the agency toward the next generation of continuous human presence in orbit, enable greater economic growth, and maintain international partnerships.
      “As we near the retirement of the International Space Station in 2030, these objectives are a pivotal next step in solidifying U.S. leadership in space,” said NASA Deputy Administrator Pam Melroy. “Our consultation with industry, academia, and international partners has helped refine a visionary roadmap for our future in low Earth orbit, which will be enabled by a continuous human presence. Together, we are ensuring that the benefits of exploring space continue to grow – advancing science, innovation, and opportunities for all, while preparing for humanity’s next giant leap of exploring the Moon, Mars and beyond.”
      In early 2024, NASA initiated a planning process that included drafting an initial set of goals and objectives for the low Earth orbit microgravity environment and seeking feedback from its workforce, government partners, industry, academia, international space agencies, and the public. The agency reviewed more than 1,800 comments and hosted two workshops, resulting in essential adjustments to the goals and objectives to better align with its partners. The final framework includes 13 goals and 44 objectives across seven key areas: commercial low Earth orbit infrastructure, operations, science, research and technology development for exploration, international cooperation, workforce development and science, technology, engineering, and mathematics (STEM) engagement, and public engagement.
      The agency’s efforts in low Earth orbit are integral to its broader ambitions for deep space exploration. The microgravity environment in low Earth orbit provides a cost-effective, easily accessible proving ground for technologies and research necessary for human missions to explore the solar system. With most of the journey to Moon and Mars occurring in microgravity, the objectives give the opportunity to continue vital human research, test future exploration systems, and retain the critical skills needed to operate in the microgravity environment.
      “These finalized objectives represent a clear path forward as NASA transitions from the International Space Station to a new era of commercial space stations,” said Robyn Gatens, director of the International Space Station and acting director of commercial spaceflight. “Low Earth orbit will remain a hub for scientific discovery, technological advancement, and international cooperation, while making strategic investments in a commercial space ecosystem that benefits not just NASA, but the entire space community.”
      The low Earth orbit microgravity goals and objectives, combined with significant stakeholder engagement, drive NASA’s need to maintain an unbroken, continuous heartbeat of humans in the commercial low Earth orbit destinations era. NASA requires long-duration flights to mitigate risk for future trips to the Red Planet. To ensure reliable access to and use of low Earth orbit, a diversity of providers operating on a regular cadence is essential. The objectives will also guide the development of requirements for future commercial space stations that will support NASA’s missions, while reducing risk for human missions to Mars, preserving operational skills, advancing critical scientific research, and sustaining engagement with international and commercial partners.
      “Collaboration and consultation remain a cornerstone of our low Earth orbit strategy,” said John Keefe, director of cross-agency strategy integration at NASA. “The objectives we’ve established will help NASA craft a work plan that ensures NASA is positioned to meet current and future needs and prioritizes the development of critical capabilities for low Earth orbit.”
      The low Earth orbit microgravity goals and objectives are available online at:
      https://go.nasa.gov/3DsMtNI
      -end-
      Amber Jacobson
      Headquarters, Washington
      202-358-1600
      amber.c.jacobson@nasa.gov
      Share
      Details
      Last Updated Dec 16, 2024 LocationNASA Headquarters Related Terms
      Pamela A. Melroy View the full article
    • By NASA
      5 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      Seen at the center of this image, NASA’s retired InSight Mars lander was captured by the agency’s Mars Reconnaissance Orbiter using its High-Resolution Imagine Science Experiment (HiRISE) camera on Oct. 23, 2024.NASA/JPL-Caltech/University of Arizona New images taken from space show how dust on and around InSight is changing over time — information that can help scientists learn more about the Red Planet.
      NASA’s Mars Reconnaissance Orbiter (MRO) caught a glimpse of the agency’s retired InSight lander recently, documenting the accumulation of dust on the spacecraft’s solar panels. In the new image taken Oct. 23 by MRO’s High-Resolution Imaging Science Experiment (HiRISE) camera, InSight’s solar panels have acquired the same reddish-brown hue as the rest of the planet.
      After touching down in November 2018, the lander was the first to detect the Red Planet’s marsquakes, revealing details of the crust, mantle, and core in the process. Over the four years that the spacecraft collected science, engineers at NASA’s Jet Propulsion Laboratory in Southern California, which led the mission, used images from InSight’s cameras and MRO’s HiRISE to estimate how much dust was settling on the stationary lander’s solar panels, since dust affected its ability to generate power.
      NASA retired InSight in December 2022, after the lander ran out of power and stopped communicating with Earth during its extended mission. But engineers continued listening for radio signals from the lander in case wind cleared enough dust from the spacecraft’s solar panels for its batteries to recharge. Having detected no changes over the past two years, NASA will stop listening for InSight at the end of this year.
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      NASA’s InSight Mars lander acquires the same reddish-brown hue as the rest of the planet in a set of images from 2018 to 2024 that were captured by the agency’s Mars Reconnaissance Orbiter using its High-Resolution Imagine Science Experiment (HiRISE) camera.NASA/JPL-Caltech/University of Arizona Scientists requested the recent HiRISE image as a farewell to InSight, as well as to monitor how its landing site has changed over time.
      “Even though we’re no longer hearing from InSight, it’s still teaching us about Mars,” said science team member Ingrid Daubar of Brown University in Providence, Rhode Island. “By monitoring how much dust collects on the surface — and how much gets vacuumed away by wind and dust devils — we learn more about the wind, dust cycle, and other processes that shape the planet.”
      Dust Devils and Craters
      Dust is a driving force across Mars, shaping both the atmosphere and landscape. Studying it helps scientists understand the planet and engineers prepare for future missions (solar-powered and otherwise), since dust can get into sensitive mechanical parts.
      When InSight was still active, scientists matched MRO images of dust devil tracks winding across the landscape with data from the lander’s wind sensors, finding these whirling weather phenomena subside in the winter and pick up again in the summer.
      The imagery also helped with the study of meteoroid impacts on the Martian surface. The more craters a region has, the older the surface there is. (This isn’t the case with Earth’s surface, which is constantly recycled as tectonic plates slide over one another.) The marks around these craters fade with time. Understanding how fast dust covers them helps to ascertain a crater’s age.
      Another way to estimate how quickly craters fade has been studying the ring of blast marks left by InSight’s retrorocket thrusters during landing. Much more prominent in 2018, those dark marks are now returning to the red-brown color of the surrounding terrain.
      HiRISE has captured many other spacecraft images, including those of NASA’s Perseverance and Curiosity rovers, which are still exploring Mars, as well as inactive missions, like the Spirit and Opportunity rovers and the Phoenix lander.
      “It feels a little bittersweet to look at InSight now. It was a successful mission that produced lots of great science. Of course, it would have been nice if it kept going forever, but we knew that wouldn’t happen,” Daubar said.
      More About MRO and InSight
      The University of Arizona, in Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., in Boulder, Colorado. A division of Caltech in Pasadena, California, JPL manages the MRO project and managed InSight for NASA’s Science Mission Directorate, Washington.
      The InSight mission was part of NASA’s Discovery Program, managed by the agency’s Marshall Space Flight Center in Huntsville, Alabama. Lockheed Martin Space in Denver built the InSight spacecraft, including its cruise stage and lander, and supported spacecraft operations for the mission.
      A number of European partners, including France’s Centre National d’Études Spatiales (CNES) and the German Aerospace Center (DLR), supported the InSight mission. CNES provided the Seismic Experiment for Interior Structure (SEIS) instrument to NASA, with the principal investigator at IPGP (Institut de Physique du Globe de Paris). Significant contributions for SEIS came from IPGP; the Max Planck Institute for Solar System Research (MPS) in Germany; the Swiss Federal Institute of Technology (ETH Zurich) in Switzerland; Imperial College London and Oxford University in the United Kingdom; and JPL. DLR provided the Heat Flow and Physical Properties Package (HP3) instrument, with significant contributions from the Space Research Center (CBK) of the Polish Academy of Sciences and Astronika in Poland. Spain’s Centro de Astrobiología (CAB) supplied the temperature and wind sensors.
      For more about the missions:
      https://science.nasa.gov/mission/insight
      science.nasa.gov/mission/mars-reconnaissance-orbiter
      News Media Contacts
      Andrew Good
      Jet Propulsion Laboratory, Pasadena, Calif.
      818-393-2433
      andrew.c.good@jpl.nasa.gov
      Karen Fox / Molly Wasser
      NASA Headquarters, Washington
      202-358-1600
      karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
      2024-175
      Share
      Details
      Last Updated Dec 16, 2024 Related Terms
      InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) Jet Propulsion Laboratory Mars Mars Reconnaissance Orbiter (MRO) Radioisotope Power Systems (RPS) Explore More
      5 min read NASA’s Perseverance Rover Reaches Top of Jezero Crater Rim
      Article 4 days ago 5 min read NASA’s Juno Mission Uncovers Heart of Jovian Moon’s Volcanic Rage
      Article 4 days ago 5 min read NASA-DOD Study: Saltwater to Widely Taint Coastal Groundwater by 2100
      Article 5 days ago Keep Exploring Discover Related Topics
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
  • Check out these Videos

×
×
  • Create New...