Jump to content

Brown Dwarfs Don't Hang Out With Stars


HubbleSite

Recommended Posts

low_STSCI-H-p0901a-k-1340x520.png

Brown dwarfs, objects that are less massive than stars but larger than planets, just got more elusive, based on studies of nearby multiple-star systems by NASA's Hubble Space Telescope. Hubble found only two brown dwarfs as companions to normal stars. This means the so-called "brown dwarf desert" (the absence of brown dwarfs around solar-type stars) extends to the smallest stars in the universe. The results are being reported today at the 213th meeting of the American Astronomical Society in Long Beach, Calif.

View the full article

Link to comment
Share on other sites

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
      For some people, working for NASA is a lifelong dream. For others, it is an interesting and perhaps unexpected opportunity that comes up at just the right time and place.

      Everything from family ties and influential teachers to witnessing human spaceflight history and enjoying sci-fi entertainment has helped bring people of all backgrounds together at NASA’s Johnson Space Center in Houston. Several of them recently shared their inspiration to join the NASA team.
      ***
      “As a kid, I always had my head up looking at the stars. I loved astronomy and seeing videos of humans walking on the Moon fascinated me! I wanted to be the first female to walk on the Moon. When Star Wars came out, I wanted to build my own R2-D2 that could explore the galaxies. I was curious how things worked (so I could build a robot) and a cousin told me about engineering. That was the name for what I wanted to do! So, I went to the High School for Engineering Professions in Houston. The guidance counselor there told me about an opportunity to apply for a summer internship with NASA as a junior. I got in and I’ve worked with NASA as much as I could since I was 16 years old – internships and full-time positions. I may not get the chance to be an astronaut and walk on the Moon, but I know I will play a role in helping achieve that dream for another female and a person of color!”
      – Alicia Baker, engineering project manager for Portable Life Support System test support, JSC Engineering, Technology, and Science (JETS) Contract

      Alicia Baker in a spacesuit test chamber at Johnson Space Center.NASA/David DeHoyos “My dad was an aerospace engineer with Lockheed Martin. I went to take your kid to work day and got to stand in front of a booster engine. I’ve wanted to work in the space industry ever since. I almost didn’t enter the field after getting my aerospace degree, but I was fortunate to take an Intro to Human Spaceflight class during my last quarter of college. Without that class and the professor (who had worked at Johnson) I wouldn’t be here today. I’m so glad my path led me here. Johnson is such a great place to be, and I can look back and tell little Margaret that we did it!”

      – Margaret Kennedy, aerospace systems engineer, Engineering Directorate Crew and Thermal Systems Division

      Margaret Kennedy and her dad visited Space Center Houston when she started her job at NASA’s Johnson Space Center in October 2019.Image courtesy of Margaret Kennedy “In first grade, my teacher organized a ‘Space Week’ in which we learned about outer space. Her sons – who were studying engineering in college – came and launched model rockets for us. I knew from that point on that I wanted to work at NASA when I grew up.”

      – Krista Farrell, International Space Station attitude determination and control officer and motion control systems instructor; Boeing Starliner guidance, navigation, and control instructor

      Krista Farrell (center) stands with members of the Expedition 71 crew. From left: NASA astronauts Jeannette Epps, Matt Dominick, and Mike Barratt; Roscosmos cosmonaut Alexander Grebenkin; and NASA astronaut Tracy C. Dyson. NASA/Josh Valcarcel “I didn’t think I would ever work for NASA. But multiple professors in college encouraged me to challenge myself and do some space research. I realized that it was something that I was very passionate about. Thanks to my research work for the Europa Clipper as an undergraduate student, I got my first internship at NASA and subsequently an offer to join the Pathways Program. Now I am part of a small group of engineers that solve entry, descent, and landing problems for multiple missions on Earth, the Moon, and Mars.”
      – Sergio Sandoval, guidance engineer, Engineering Directorate Flight Mechanics and Trajectory Design Branch

      Sergio Sandoval helps staff a NASA table during a Johnson Space Center community engagement event.Image courtesy of Sergio Sandoval
      “Dad would take me to the viewing room of the original Mission Operations Control Room (MOCR) during the Apollo era. He was one of the people supporting MOCR in the Staff Support Room. I have worked at Johnson for 27 years [as a contractor] for Lockheed Martin, Hamilton Sundstrand, and Jacobs Technology.”
      – David Fanelli, software engineer, Energy Systems Test Area

      “In early 1969, when I was a boy, my uncle visited the Johnson Space Center and brought back astronaut and mission photos of the recently completed Apollo 8 lunar orbiting mission. Those photos, coupled with a Saturn V rocket model I assembled, and the Time Life records and books about the Apollo space program my parents purchased for me, sparked my imagination. I knew I wanted to work for NASA one day. It wasn’t until many years later that that dream became a reality, when I joined NASA’s co-op program for college students during my second attempt to become an aeronautical engineer. After I graduated college, I began working full time as a civil servant engineer at Johnson.”
      – David Fletcher, NASA lead, Gateway-Ready Avionics Integration Lab

      David Fletcher (center) with his daughters Jessica (left) and Erica (right). Image courtesy of David Fletcher
      “I remember watching Star Trek and Star Wars as a kid with my dad. I found some of his college notes in a box one day and thought the small, neat print on graph paper pads was really pretty. He went to the University of Texas at Austin to study astrophysics and engineering, but he never got to finish. Fast forward to 2022 and I find myself in Houston for an unknown amount of time, so I decided to go out and make some friends. I met a woman at a Geeky Game Night, and I learned that she was a food scientist at NASA! After talking some more, she told me to send her my resume. Later that week I received a call to set up an interview. I’m still in awe of how that one chance connection led me to my childhood dream of working at NASA.”

      – Kristin Dillon, document/IT specialist, Space Food Systems Laboratory


      “I grew up in a small agricultural village in India. My first introduction to spaceflight was reading Russian cosmonauts’ translated accounts of the Apollo-Soyuz Test Project as a young girl. I am still not sure whether my father picked that book for me on a whim or with a grand dream for his daughter, but it certainly had me hooked. However, I found my true calling to make human spaceflight safer and more efficient after witnessing the Columbia mishap. India, at the time, did not have a human spaceflight program. Thus started a 20-year-long grand adventure of seeking opportunities, pursuing them, immigrating to the United States, and finding my path to NASA, which culminated in a Pathways internship at Johnson.”

      – Poonampreet Kaur Josan, three-time Pathways intern, currently supporting the Human Health and Performance Directorate Habitability and Human Factors Branch
      View the full article
    • By NASA
      The NASA Ames Science Directorate recognizes the outstanding contributions of (pictured left to right) Sangsavang Stevie Phothisane, Taryn Kavanagh, Andro Rios, and Hami Ray. Their commitment to the NASA mission represents the talent, camaraderie, and vision needed to explore this world and beyond.

      Earth Science Star: Sangsavang Stevie Phothisane
      Sangsavang Stevie Phothisane, a Deputy Project Manager in the Earth Science Project Office (ESPO), demonstrated outstanding leadership as the site manager for both of the field campaigns of the Arctic Radiation-Cloud-Aerosol-Surface Interaction Experiment (ARCSIX) based at Pituffik Space Base, Greenland.  He has excelled in managing this large and complex project, which encompasses over 75 scientists and engineers and 3 research aircraft, in an extremely remote location 750 miles north of the Arctic Circle.

      Space Science & Astrobiology Star: Taryn Kavanagh
      Taryn Kavanagh, Research Support Specialist, is an indispensable member of the Astrophysics Branch. She is a consummate professional in all of her administrative duties and goes above and beyond expectations to support our team, our customers and our mission. Taryn recently supported many high-level visits with increased workload in addition to meeting branch needs which has boosted morale and goodwill with both internal and external partners.

      Space Science & Astrobiology Star of the Month: Andro Rios
      Dr. Andro Rios, a research scientist in the Exobiology Branch, established new strategic partnerships with San Jose State University and Skyline College through the Science Mission Directorate Bridge Program (now MOSAICS). He was awarded grant funding for the ASPIRE Program (Astrobiology Scholars Program Immersive Research Experience), offering a two-year internship for under-represented undergraduates to work with NASA scientists and engineers. Dr. Rios selected and successfully led the first cohort of students for ASPIRE this summer.

      Space Biosciences Star: Hami Ray
      Hami Ray has stepped up as the Deputy Project Manager for the Lunar Explorer Instrument for space biology Applications (LEIA) mission to study the biological effects of the lunar surface’s extreme environmental conditions on living organisms. She has been instrumental in timely and critical process improvement efforts for LEIA to enable project success. In addition to Ray’s role with LEIA, she also excels as the Deputy Project Manager for the Space Synthetic Biology (SynBio) mission and as the Project Manager for the GLOW mission concept to explore Venus’ upper atmospheric dynamics.

      View the full article
    • By NASA
      In this image of the Serpens Nebula from NASA’s James Webb Space Telescope, astronomers found a grouping of aligned protostellar outflows within one small region (the top left corner). Serpens is a reflection nebula, which means it’s a cloud of gas and dust that does not create its own light, but instead shines by reflecting the light from stars close to or within the nebula.NASA, ESA, CSA, STScI, Klaus Pontoppidan (NASA-JPL), Joel Green (STScI) NASA’s James Webb Space Telescope has captured a phenomenon for the very first time. The bright red streaks at top left of this June 20, 2024, image are aligned protostar outflows – jets of gas from newborn stars that all slant in the same direction.
      This image supports astronomers’ assumption that as clouds collapse to form stars, the stars will tend to spin in the same direction. Previously, the objects appeared as blobs or were invisible in optical wavelengths. Webb’s sensitive infrared vision was able to pierce through the thick dust, resolving the stars and their outflows.
      Image credit: NASA, ESA, CSA, STScI, Klaus Pontoppidan (NASA-JPL), Joel Green (STScI)
      View the full article
    • By NASA
      The NASA Ames Science Directorate recognizes the outstanding contributions of (pictured left to right) Ryan T. Scott, Mike Kubo, Ehsan (Sam) Gharib-Nezhad, and Kristen Okorn. Their commitment to the NASA mission represents the talent, camaraderie, and vision needed to explore this world and beyond.
      Space Biosciences Star: Ryan T. Scott
      Ryan Scott, a Space Biosciences Research Branch (SCR) scientist, serves as the Science Lead for the Open Science Data Repository (OSDR) and chairs the Ames Life Sciences Data Archive (ALSDA) analysis working group, where he guides the efforts of nearly 200 professionals. He contributed significantly to the Space Omics and Medical Atlas (SOMA) Nature publication package, the largest-ever collection of data for aerospace medicine and space biology.
      Space Science Star: Mike Kubo
      Mike Kubo is an indispensable member of the Exobiology Branch (STX) with expertise in astrobiology and biogeochemistry who plays a vital role in the conduct of research and outreach.  While always a star in the branch, most recently, Mike saved the day by noticing the imminent failure of a shared research-grade freezer in building N239 that stored irreplaceable samples, and quickly identified a replacement.
      Space Science Star: Ehsan (Sam) Gharib-Nezhad
      Dr. Ehsan (Sam) Gharib-Nezhad is a data and research scientist with the Planetary Systems Branch (STT). A specialist in exoplanetary atmospheres and artificial intelligence (AI)/machine learning (ML), Sam was recently selected as lead for the Habitable Worlds Observatory (HWO) working group for AI/ML.
      Earth Science Star: Kristen Okorn
      Kristen Okorn is a Research Scientist with the Bay Area Environmental Research Institute (BAERI), affiliated with the Atmospheric Science Branch (SGG). She is one of the two center coordinators for NASA’s Disasters Response Coordination System, and the PI for the recently awarded NASA Mentoring and Opportunities in STEM with Academic Institutions for Community Success (MOSAICS) seed project focused on year-round hands-on learning and mentoring of three undergraduate students from a minority-serving institution (Whittier College) in the use of low-cost sensors and satellite-based measurements to study regional air pollution.
      View the full article
    • By NASA
      “We have a group photo of my first project here, ASTRO-H, and that one means a lot to me because I came [to that NASA project] fresh off the street. I was super scared and intimidated. It was me and three other [technicians], who were also all new, and a handful of very seasoned scientists and engineers. And we came together.
      “And we actually came in — I believe — under budget, ahead of schedule, and exceeded all expectations for our test results. That’s kind of unheard of, you know what I mean? We had such a good environment in the lab. Everybody got along so well. It was all teamwork. And everything just gelled.
      “So when I look back on that photo from 14 years ago, first of all, I look really young in it. And secondly, it makes me realize how blessed and lucky I’ve been to be here for so long. It reminds me of that guy who was really nervous and still did alright. [It reminds me] to have a little confidence in myself, just be me, and do the work. It’ll all work out.
      “I love looking back at that first team photo and just remembering how raw everything was at the time and how well it still came out.”
      —Clifton Brown, Engineering Technician, OMES III, NASA’s Goddard Space Flight Center
      Image Credit: NASA/Thalia Patrinos
      Interviewer: NASA/Thalia Patrinos
      Check out some of our other Faces of NASA. 
      View the full article
  • Check out these Videos

×
×
  • Create New...