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    • By NASA
      4 min read
      Three-Year Study of Young Stars with NASA’s Hubble Enters New Chapter
      In the largest and one of the most ambitious Hubble Space Telescope programs ever executed, a team of scientists and engineers collected information on almost 500 stars over a three-year period. This effort offers new insights into the stars’ formation, evolution, and impact on their surroundings. 
      This comprehensive survey, called ULLYSES (Ultraviolet Legacy Library of Young Stars as Essential Standards), was completed in December 2023, and provides a rich spectroscopic dataset obtained in ultraviolet light that astronomers will be mining for decades to come. Because ultraviolet light can only be observed from space, Hubble is the only active telescope that can accomplish this research. 
      The ULLYSES program studied two types of young stars: super-hot, massive, blue stars and cooler, redder, less massive stars than our Sun. The top panel is a Hubble Space Telescope image of a star-forming region containing massive, young, blue stars in 30 Doradus, the Tarantula Nebula. Located within the Large Magellanic Cloud, this is one of the regions observed by ULLYSES. The bottom panel shows an artist’s concept of a cooler, redder, young star that less massive than our Sun. This type of star is still gathering material from its surrounding, planet-forming disk. NASA, ESA, STScI, Francesco Paresce (INAF-IASF Bologna), Robert O’Connell (UVA), SOC-WFC3, ESO
      Download this image

      “I believe the ULLYSES project will be transformative, impacting overall astrophysics – from exoplanets, to the effects of massive stars on galaxy evolution, to understanding the earliest stages of the evolving universe,” said Julia Roman-Duval, Implementation Team Lead for ULLYSES at the Space Telescope Science Institute (STScI) in Baltimore, Maryland. “Aside from the specific goals of the program, the stellar data can also be used in fields of astrophysics in ways we can’t yet imagine.”
      The ULLYSES team studied 220 stars, then combined those observations with information from the Hubble archive on 275 additional stars. The program also included data from some of the world’s largest, most powerful ground-based telescopes and X-ray space telescopes. The ULLYSES dataset is made up of stellar spectra, which carry information about each star’s temperature, chemical composition, and rotation. 
      One type of stars studied under ULLYSES is super-hot, massive, blue stars. They are a million times brighter than the Sun and glow fiercely in ultraviolet light that can easily be detected by Hubble. Their spectra include key diagnostics of the speed of their powerful winds. The winds drive galaxy evolution and seed galaxies with the elements needed for life. Those elements are cooked up inside the stars’ nuclear fusion ovens and then injected into space as a star dies. ULLYSES targeted blue stars in nearby galaxies that are deficient in elements heavier than helium and hydrogen. This type of galaxy was common in the very early universe. “ULLYSES observations are a stepping stone to understanding those first stars and their winds in the universe, and how they impact the evolution of their young host galaxy,” said Roman-Duval.  
      The other star category in the ULLYSES program is young stars less massive than our Sun. Though cooler and redder than our Sun, in their formative years they unleash a torrent of high-energy radiation, including blasts of ultraviolet light and X-rays. Because they are still growing, they are gathering material from their surrounding planet-forming disks of dust and gas. The Hubble spectra include key diagnostics of the process by which they acquire their mass, including how much energy this process releases into the surrounding planet-forming disk and nearby environment. The blistering ultraviolet light from young stars affects the evolution of these disks as they form planets, as well as the chances of habitability for newborn planets. The target stars are located in nearby star-forming regions in our Milky Way galaxy.
      The ULLYSES concept was designed by a committee of experts with the goal of using Hubble to provide a legacy set of stellar observations. “ULLYSES was originally conceived as an observing program utilizing Hubble’s sensitive spectrographs. However, the program was tremendously enhanced by community-led coordinated and ancillary observations with other ground- and space-based observatories,” said Roman-Duval. “Such broad coverage allows astronomers to investigate the lives of stars in unprecedented detail and paint a more comprehensive picture of the properties of these stars and how they impact their environment.”
      To that end, STScI hosted a ULLYSES workshop March 11–14 to celebrate the beginning of a new era of research on young stars. The goal was to allow members of the astronomical community to collaborate on the data, so that they could gain momentum in the ongoing analyses, or kickstart new ideas for analysis. The workshop was one important step in exploiting this legacy spectral library to its fullest potential, fulfilling the promise of ULLYSES.
      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, Colorado, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, Maryland, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
      Media Contacts:
      Claire Andreoli
      NASA’s Goddard Space Flight Center, Greenbelt, MD
      claire.andreoli@nasa.gov
      Ann Jenkins / Ray Villard
      Space Telescope Science Institute, Baltimore, MD
      Science Contact:
      Julia Roman-Duval
      Space Telescope Science Institute, Baltimore, MD
      Share








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      Last Updated Mar 28, 2024 Editor Andrea Gianopoulos Related Terms
      Astrophysics Astrophysics Division Goddard Space Flight Center Hubble Space Telescope Missions Stars The Universe Keep Exploring Discover More Topics From NASA
      Hubble Space Telescope


      Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.


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    • By NASA
      4 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      NASA astronaut Loral O’Hara is returning home after six months aboard the International Space Station. During her time on the orbiting laboratory, O’Hara contributed to dozens of scientific investigations and technology demonstrations to prepare for future space exploration missions and generate innovations and benefits for humanity on Earth.
      Here is a look at some of the scientific activities O’Hara conducted during her mission:
      Biking for Better Health
      NASA NASA astronaut Loral O’Hara is among the first astronauts participating in the CIPHER (Complement of Integrated Protocols for Human Exploration Research on Varying Mission Durations) investigation. CIPHER examines physiological and psychological changes that humans undergo during spaceflight. One of the protocols measures changes in cardiorespiratory and muscle fitness during exercise. Collecting data from crew members on missions of different durations supports development of ways to protect crew member health on a long mission such as a trip to Mars.
      Tending the Space Garden
      NASA NASA astronaut Loral O’Hara works with tomato plants grown for Plant Habitat-06, an investigation using genetic analysis to examine how spaceflight affects plant immune function and production. Results could support development of crops to provide food and other services on future space missions. On Earth, pathogens are responsible for up to 40% of global crop loss, and insight into the interaction between gravity and how plants respond to pathogens could inform strategies to enhance crop growth and productivity.
      Reading Radiation Exposure
      NASA Crew members pose with active dosimeters: left to right, Andreas Mogensen of ESA (European Space Agency), NASA astronauts Loral O’Hara and Jasmin Moghbeli, and Satoshi Furukawa of JAXA (Japan Aerospace Exploration Agency). These devices monitor individual radiation exposure for the International Space Station Internal Radiation Monitoring investigation, which aims to keep ionizing radiation exposure at levels acceptable for maintaining crew member health and safety and ensuring the success of their missions.
      Understanding Bone Loss
      NASA Bone loss is a major problem of aging on Earth and a serious health concern for astronauts. MABL-A (Microgravity Associated Bone Loss-A) examines the effect of microgravity on bone marrow mesenchymal stem cells, which produce bone-forming cells and play a role in making and repairing skeletal tissues. NASA astronaut Loral O’Hara works inside the Life Science Glovebox for the investigation, which could improve understanding of the mechanisms behind bone loss and support development of ways to better protect crew members and people on Earth from its effects.
      Bringing in the Cold
      NASA NASA astronauts Jasmin Moghbeli and Loral O’Hara pose in front of the Cold Atom Lab. The lab produces clouds of atoms so cold that they have almost no motion, allowing researchers to observe their fundamental behaviors and quantum characteristics. Physicists have long pursued ever colder temperatures, and microgravity may make it possible to achieve those temperatures for longer periods of time. The Cold Atom Lab research could facilitate the development of new quantum technology.
      Taking Out the Heat
      NASA NASA astronaut Loral O’Hara works on MaRVIn-PCIM (Microgravity Research for Versatile Investigations-Phase Change in Mixtures), which examines the dynamics of liquid and vapor flow inside a wickless heat pipe. These devices, used to dissipate heat to cool satellites and electronics, operate differently in microgravity than on Earth. Results could support development of lighter and more efficient cooling devices for future space exploration.
      Preparing for a Walk in Space
      NASA NASA astronaut Loral O’Hara tests components of her spacesuit in preparation for a spacewalk. O’Hara and NASA astronaut Jasmin Moghbeli conducted a spacewalk together on Nov 1, 2023. It took the duo six hours and 42 minutes to complete tasks that included working on hardware that enables the space station’s solar arrays to track the Sun, helping to provide power for scientific operations on the orbiting lab.
      Creating Cardiac Tissues
      NASA NASA astronaut Loral O’Hara works on the Redwire Cardiac Bioprinting Investigation (BFF Cardiac), which studies bio-printed cardiac tissues. Higher-quality 3D tissues can be printed in microgravity, where density layers, settling, and other effects of gravity are absent. This technology supports development of ways to print food and medicine on demand on future missions, reducing mass and cost at launch and improving crew health and safety. Results also could advance technologies to create replacement organs and tissues for transplant on Earth, helping to alleviate shortages.
      Melissa Gaskill
      International Space Station Research Communications Team
      Johnson Space Center
      Search this database of scientific experiments to learn more about those mentioned above.
      Download full-resolution versions of all photos in this article.
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    • By European Space Agency
      In the run up to April’s total solar eclipse, ESA-led Solar Orbiter and NASA-led Parker Solar Probe are both at their closest approach to the Sun. They are taking the opportunity to join hands in studying the driving rain of plasma that streams from the Sun, fills the Solar System, and causes dazzlement and destruction at Earth.
      View the full article
    • By NASA
      NASA astronaut Don Pettit poses for a crew portrait at the Gagarin Cosmonaut Training Center.NASA During his fourth mission to the International Space Station, NASA astronaut Don Pettit will serve as a flight engineer and member of the Expedition 71/72 crew. After blasting off to space, Pettit will conduct scientific investigations and technology demonstrations to help prepare crew for future space missions.
      Pettit will launch on the Roscosmos Soyuz MS-26 spacecraft in September 2024, accompanied by Roscosmos cosmonauts Alexey Ovchinin and Ivan Vagner. The trio will spend approximately six months aboard the orbital laboratory.
      NASA selected Pettit as an astronaut in 1996. A veteran of three spaceflights, he made integral advancements in technology and demonstrations for human exploration. He served as a science officer for Expedition 6 in 2003, operated the robotic arm for STS-126 space shuttle Endeavour in 2008, and served as a flight engineer for Expedition 30/31 in 2012. Pettit has logged 370 days in space and conducted two spacewalks totaling 13 hours and 17 minutes.
      The Expedition 6 crew launched on STS-113 space shuttle Endeavour expecting to return on STS-114 space shuttle Discovery after a two and a half month mission. Following the space shuttle Columbia accident that grounded the shuttle fleet, the crew returned on the Soyuz TMA-1 spacecraft after five and a half months, landing in Kazakhstan. On his next 16-day mission, STS-126, Pettit helped expand the living quarters of the space station and installed a regenerative life support system to reclaim potable water from urine. During Expedition 30/31, Pettit also captured the first commercial cargo spacecraft, the SpaceX Dragon, using the robotic arm.
      A native from Silverton, Oregon, Pettit holds a bachelor’s degree in chemical engineering from Oregon State University, Corvallis, and a doctorate in chemical engineering from the University of Arizona, Tucson. Prior to his career with NASA, Pettit worked as a staff scientist at the Los Alamos National Laboratory in New Mexico.
      For more than two decades, humans have lived and worked continuously aboard the International Space Station, advancing scientific knowledge and making research breakthroughs that are not possible on Earth. The station is a critical testbed for NASA to understand and overcome the challenges of long-duration spaceflight and to expand commercial opportunities in low Earth orbit. As commercial companies focus on providing human space transportation services and destinations as part of a robust low Earth orbit economy, NASA is able to focus more of its resources on deep space missions to the Moon and Mars.
      Get breaking news, images and features from the space station on the station blog, Instagram, Facebook, and X.
      Learn more about International Space Station research and operations at:
      https://www.nasa.gov/station
      -end-
      Julian Coltre / Claire O’Shea
      Headquarters, Washington
      202-358-1100
      julian.n.coltre@nasa.gov / claire.a.o’shea@nasa.gov
      Courtney Beasley
      Johnson Space Center, Houston
      281-483-5111
      courtney.m.beasley@nasa.gov
      Share
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      Last Updated Mar 27, 2024 LocationNASA Headquarters Related Terms
      International Space Station (ISS) Humans in Space ISS Research Missions View the full article
    • By NASA
      4 min read
      Contribute to NASA Research on Eclipse Day – and Every Day
      NASA is celebrating the Sun during the Heliophysics Big Year, which extends through the end of 2024. You can get involved to help us learn more about our star and its influence on our planet. With exciting experiments happening during the total solar eclipse that will cross North America on April 8, to widespread investigations going on throughout the year, keep reading to find a project that’s right for you.
      The dark band that runs from Mexico into Texas and all the way to Maine and Maritime Canada shows the path of totality for the April 8, 2024, eclipse. This is the area where people on Earth can witness a total eclipse of the Sun. Outside of this path, observers may see a partial eclipse, with the amount of the Sun being blocked by the Moon decreasing with distance from the path.  NASA/Scientific Visualization Studio/Michala Garrison; Eclipse Calculations By Ernie Wright, NASA Goddard Space Flight Center What Is Citizen Science (Also Called Participatory Science)?
      NASA defines citizen science as “a form of open collaboration in which individuals or organizations participate in the scientific process in various ways” from collecting and analyzing data to making discoveries and solving problems. ”Citizen” here refers to citizens of planet Earth, and these projects are open to everyone, regardless of country of birth or legal citizenship status.
      NASA sponsors citizen science projects across all five areas of research that it pursues: Earth science, planetary science, astrophysics, biological and physical sciences, and heliophysics. And yes, there are a few projects that are focused on the April 8 solar eclipse!
      What You Can Do
      Depending which project you join, you might:
      Observe and record in pictures or words natural phenomena like clouds, animal noises, or a solar eclipse. Learn how to recognize or classify patterns in data or pictures of a comet or solar jet. Learn how to build and use scientific equipment like radio telescopes or ham radios. Your contribution may be a large or small piece of the picture, but what you do as part of a NASA citizen science project is essential to answering the research question or need that the project addresses. And while you’re contributing to science, you might also develop new skills and make friends. You can read about some project participants – and what motivates them – in these profiles.
      The Projects
      NASA citizen science projects related to the April 8, 2024, eclipse and solar science are presented in four groups below. You can see all NASA citizen science projects on this website.
      Use the tables below to find the project for you! A few notes:
      “Minimum time required” refers to how much time it would take you to get up to speed from the start. “Where” refers to where you need to be in order to participate. Are you an educator looking for ways to involve your formal or informal students in eclipse-related science? Check out this companion blog post for some tips for educators.
      Eclipse Projects That Need You on April 8!
      Quick-Start Projects That Require No Special Equipment
      Prerequisite knowledge Preparation/ Training Required equipment Challenge level Minimum time required Where Eclipse Soundscapes (Observer role) none online, minutes printable form easy minutes outside, in or near the path of totality GLOBE Observer: Eclipse Protocol none in app, minutes smartphone, air temperature thermometer easy minutes outside, in or near the path of totality SunSketcher none in app, minutes smartphone (download app in advance) easy minutes outside, in path of totality More Demanding Projects That Require Special Equipment
      Prerequisite knowledge Preparation/ Training Required equipment Challenge level Minimum time required Where Eclipse Soundscapes (Data Collector role) none online, minutes AudioMoth with micro-SD cards easy hours outside, in or near the path of totality Eclipse Megamovie 2024 how to use DSLR camera online, minutes DSLR camera and tracking mount moderate hours outside, in path of totality HamSCI familiarity with ham radios online, self-directed, hours web-connected device and/or ham radio moderate days inside Radio JOVE none online, self-directed, days to weeks web-connected device and/or radio telescope moderate weeks outside and/or online Citizen Continental-America Telescope Eclipse (CATE) 2024 none in person, days telescope, computer, cameras – provided to selected teams high (application period closed) days outside, in path of totality Dynamic Eclipse Broadcast (DEB) Initiative none online, hours telescope – provided to selected teams high (application period closed) days outside, in and off the path of totality Heliophysics Projects That You Can Do Anytime
      Quick-Start Projects, No Special Equipment Required
      Prerequisite knowledge Preparation/ Training Required equipment Challenge level Minimum time required Where HARP – Heliophysics Audified: Resonance in Plasmas none online, minutes web-connected device easy minutes online Solar Jet Hunter none online, minutes web-connected device easy minutes online More Demanding Projects That Require Special Equipment
      Prerequisite knowledge Preparation/ Training Required equipment Challenge level Minimum time required Where Aurorasaurus none online, minutes web-connected device, camera optional moderate hours outside, high latitudes Dynamic Eclipse Broadcast (DEB) Initiative none online, hours telescope – provided to selected teams moderate hours outside HamSCI familiarity with ham radios online, self-directed, hours web-connected device and/or ham radio moderate weeks indoors Radio JOVE familiarity with radio telescopes online, self-directed, hours web-connected device and/or radio telescope moderate weeks outside and/or online Spritacular none online, minutes web-connected device and/or camera moderate minutes outside and/or online Sungrazer Project none online, hours web-connected device high hours online Advanced Participation
      Many NASA citizen science projects start out with a straightforward, structured task, but that doesn’t have to be where your contributions end. Some projects offer webinars or host regular video conference calls where enthusiastic volunteers can learn about and participate in the work that comes after data collection or classification. Hundreds of volunteers have become involved in deep ways. Over 450 volunteers have even been recognized for their contributions by being named as co-authors of scientific papers, which are the formal way in which scientists announce new discoveries and ideas.
      By Sarah Kirn
      Citizen Science Strategist, NASA, at the Gulf of Maine Research Institute
      Share








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      Last Updated Mar 27, 2024 Related Terms
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