Jump to content

Recommended Posts

Posted
low_STSCI-H-p0308a-k-1340x520.png

Astronomers using NASA's Hubble Space Telescope have observed for the first time the atmosphere of a planet beyond our solar system evaporating into space. Most of the planet may eventually disappear, leaving only a dense core. The evaporating planet is a member of a type of planet called a "hot Jupiter," a giant gaseous planet that orbits very closely around its parent star, drawn to it like a moth to a flame. The scorched planet, called HD 209458b, orbits only 4 million miles (7 million kilometers) from its yellow, Sun-like star. The planet circles the parent star in a tight 3.5-day orbit. The Hubble observations reveal a hot and bloated hydrogen atmosphere, which is evaporating off the planet. This huge envelope of hydrogen resembles a comet with a tail trailing behind the planet.

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
      ESA/Hubble & NASA, R. Windhorst, W. Keel This NASA/ESA Hubble Space Telescope image features a spiral galaxy, named UGC 10043. We don’t see the galaxy’s spiral arms because we are seeing it from the side. Located roughly 150 million light-years from Earth in the constellation Serpens, UGC 10043 is one of the somewhat rare spiral galaxies that we see edge-on.
      This edge-on viewpoint makes the galaxy’s disk appear as a sharp line through space, with its prominent dust lanes forming thick bands of clouds that obscure our view of the galaxy’s glow. If we could fly above the galaxy, viewing it from the top down, we would see this dust scattered across UGC 10043, possibly outlining its spiral arms. Despite the dust’s obscuring nature, some active star-forming regions shine out from behind the dark clouds. We can also see that the galaxy’s center sports a glowing, almost egg-shaped ‘bulge’, rising far above and below the disk. All spiral galaxies have a bulge similar to this one as part of their structure. These bulges hold stars that orbit the galactic center on paths above and below the whirling disk; it’s a feature that isn’t normally obvious in pictures of galaxies. The unusually large size of this bulge compared to the galaxy’s disk is possibly due to UGC 10043 siphoning material from a nearby dwarf galaxy. This may also be why its disk appears warped, bending up at one end and down at the other.
      Like most full-color Hubble images, this image is a composite, made up of several individual snapshots taken by Hubble at different times, each capturing different wavelengths of light. One notable aspect of this image is that the two sets of data that comprise this image were collected 23 years apart, in 2000 and 2023! Hubble’s longevity doesn’t just afford us the ability to produce new and better images of old targets; it also provides a long-term archive of data which only becomes more and more useful to astronomers.
      View the full article
    • By NASA
      Artist’s concept depicts new research that has expanded our understanding of exoplanet WASP-69 b’s “tail.” NASA/JPL-Caltech/R. Hurt (IPAC) The Planet
      WASP-69 b
      The Discovery
      The exoplanet WASP-69 b has a “tail,” leaving a trail of gas in its wake.
      Key Takeaway 
      WASP-69 b is slowly losing its atmosphere as light hydrogen and helium particles in the planet’s outer atmosphere escape the planet over time. But those gas particles don’t escape evenly around the planet, instead they are swept into a tail of gas by the stellar wind coming from the planet’s star. 
      Details
      Hot Jupiters like WASP-69 b are super-hot gas giants orbiting their host stars closely. When radiation coming from a star heats up a planet’s outer atmosphere, the planet can experience photoevaporation, a process in which lightweight gases like hydrogen and helium are heated by this radiation and launched outward into space. Essentially, WASP-69 b’s star strips gas from the planet’s outer atmosphere over time. 
      What’s more, something called the stellar wind can shape this escaping gas into an exoplanetary tail. 
      The stellar wind is a continuous stream of charged particles that flow outwards into space from a star’s outer atmosphere, or corona. On Earth, the Sun’s stellar wind interacts with our planet’s magnetic field which can create beautiful auroras like the Northern Lights. 
      On WASP-69 b, the stellar wind coming from its host star actually shapes the gas escaping from the planet’s outer atmosphere. So, instead of gas just escaping evenly around the planet, “strong stellar winds can sculpt that outflow in tails that trail behind the planet,” said lead author Dakotah Tyler, an astrophysicist at the University of California, Los Angeles, likening this gaseous tail to a comet’s tail. 
      Because this tail is created by the stellar wind, however, that means it’s subject to change. 
      “If the stellar wind were to taper down, then you could imagine that the planet is still losing some of its atmosphere, but it just isn’t getting shaped into the tail,” Tyler said, adding that, without the stellar wind, that gas escaping on all sides of the planet would be spherical and symmetrical. “But if you crank up the stellar wind, that atmosphere then gets sculpted into a tail.” 
      Tyler likened the process to a windsock blowing in the breeze, with the sock forming a more structured shape when the wind picks up and it fills with air. 
      The tail that Tyler and his research team observed on WASP-69 b extended more than 7.5 times the radius of the planet, or over 350,000 miles. But it’s possible that the tail is even longer. The team had to end observations with the telescope before the tail’s signal disappeared, so this measurement is a lower limit on the tail’s true length at the time. 
      However, keep in mind that because the tail is influenced by the stellar wind, changes in the stellar wind could change the tail’s size and shape over time. Additionally changes in the stellar wind influence the tail’s size and shape, but since the tail is visible when illuminated by starlight, changes in stellar activity can also affect tail observations. 
      Exoplanet tails are still a bit mysterious, especially because they are subject to change. The study of exoplanet tails could help scientists to better understand how these tails form as well as the ever-changing relationship between the stellar and planetary atmospheres. Additionally, because these exoplanetary tails are shaped by stellar activity, they could serve as indicators of stellar behavior over time. This could be helpful for scientists as they seek to learn more about the stellar winds of stars other than the star we know the most about, our very own Sun. 
      Fun Facts
      WASP-69 b is losing a lot of gas — about 200,000 tons per second. But it’s losing this gaseous atmosphere very slowly — so slowly in fact that there is no danger of the planet being totally stripped or disappearing. In general, every billion years, the planet is losing an amount of material that equals the mass of planet Earth. 
      The solar system that WASP-69 b inhabits is about 7 billion years old, so even though the rate of atmosphere loss will vary over time, you might estimate that this planet has lost the equivalent of seven Earths (in mass) of gas over that period. 
      The Discoverers 
      A team of scientists led by Dakotah Tyler of the University of California, Los Angeles published a paper in January, 2024 on their discovery, “WASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 Rp,” in the journal, “The Astrophysical Journal.” The observations described in this paper were made by Keck/NIRSPEC (NIRSPEC is a spectrograph designed for Keck II). 
      View the full article
    • By NASA
      Hubble Space Telescope Home Hubble Spots a Spiral in the… 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 Online Activities Lithographs Fact Sheets Glossary Posters Hubble on the NASA App More 35th Anniversary   2 min read
      Hubble Spots a Spiral in the Celestial River
      This NASA/ESA Hubble Space Telescope image features the spiral galaxy NGC 1637. ESA/Hubble & NASA, D. Thilker The subject of this NASA/ESA Hubble Space Telescope image is NGC 1637, a spiral galaxy located 38 million light-years from Earth in the constellation Eridanus, the River.
      This image comes from an observing program dedicated to studying star formation in nearby galaxies. Stars form in cold, dusty gas clouds that collapse under their own gravity. As young stars grow, they heat their nurseries through starlight, winds, and powerful outflows. Together, these factors play a role in controlling the rate at which future generations of stars form.
      NGC 1637 holds evidence of star formation scattered throughout its disk, if you know where to look. The galaxy’s spiral arms have pockets of pink clouds, many with bright blue stars. The pinkish color comes from hydrogen atoms excited by ultraviolet light from young, massive stars forming within the clouds. This contrasts with the warm yellow glow of the galaxy’s center, which is home to a densely packed collection of older, redder stars.
      The stars that set their cloudy birthplaces aglow are comparatively short-lived, and many of these stars will explode as supernovae just a few million years after they’re born. In 1999, NGC 1637 played host to a supernova named SN 1999EM, lauded as the brightest supernova seen that year. When a massive star expires as a supernova, the explosion outshines its entire home galaxy for a short time. While a supernova marks the end of a star’s life, it can also jump start the formation of new stars by compressing nearby clouds of gas, beginning the stellar lifecycle anew.
      Explore More

      Hubble’s Galaxies


      Exploring the Birth of Stars


      Homing in on Cosmic Explosions


      Hubble’s Nebulae


      Hubble Focus E-Book: Galaxies through Space and Time

      Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
      Claire Andreoli (claire.andreoli@nasa.gov)
      NASA’s Goddard Space Flight Center, Greenbelt, MD
      Share








      Details
      Last Updated Dec 05, 2024 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Galaxies Goddard Space Flight Center Hubble Space Telescope Spiral Galaxies Stars Supernovae View the full article
    • By NASA
      Hubble Space Telescope Home NASA’s Hubble Takes the… 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 Online Activities Lithographs Fact Sheets Glossary Posters Hubble on the NASA App More 35th Anniversary   4 Min Read NASA’s Hubble Takes the Closest-Ever Look at a Quasar
      A NASA Hubble Space Telescope image of the core of quasar 3C 273. Credits:
      NASA, ESA, Bin Ren (Université Côte d’Azur/CNRS); Acknowledgment: John Bahcall (IAS); Image Processing: Joseph DePasquale (STScI) Astronomers have used the unique capabilities of NASA’s Hubble Space Telescope to peer closer than ever into the throat of an energetic monster black hole powering a quasar. A quasar is a galactic center that glows brightly as the black hole consumes material in its immediate surroundings.
      The new Hubble views of the environment around the quasar show a lot of “weird things,” according to Bin Ren of the Côte d’Azur Observatory and Université Côte d’Azur in Nice, France. “We’ve got a few blobs of different sizes, and a mysterious L-shaped filamentary structure. This is all within 16,000 light-years of the black hole.”
      Some of the objects could be small satellite galaxies falling into the black hole, and so they could offer the materials that will accrete onto the central supermassive black hole, powering the bright lighthouse. “Thanks to Hubble’s observing power, we’re opening a new gateway into understanding quasars,” said Ren. “My colleagues are excited because they’ve never seen this much detail before.”
      Quasars look starlike as point sources of light in the sky (hence the name quasi-stellar object). The quasar in the new study, 3C 273, was identified in 1963 by astronomer Maarten Schmidt as the first quasar. At a distance of 2.5 billion light-years it was too far away for a star. It must have been more energetic than ever imagined, with a luminosity over 10 times brighter than the brightest giant elliptical galaxies. This opened the door to an unexpected new puzzle in cosmology: What is powering this massive energy production? The likely culprit was material accreting onto a black hole.
      A Hubble Space Telescope image of the core of quasar 3C 273. A coronagraph on Hubble blocks out the glare coming from the supermassive black hole at the heart of the quasar. This allows astronomers to see unprecedented details near the black hole such as weird filaments, lobes, and a mysterious L-shaped structure, probably caused by small galaxies being devoured by the black hole. Located 2.5 billion light-years away, 3C 273 is the first quasar (quasi-stellar object) ever discovered, in 1963. NASA, ESA, Bin Ren (Université Côte d’Azur/CNRS); Acknowledgment: John Bahcall (IAS); Image Processing: Joseph DePasquale (STScI) In 1994 Hubble’s new sharp view revealed that the environment surrounding quasars is far more complex than first suspected. The images suggested galactic collisions and mergers between quasars and companion galaxies, where debris cascades down onto supermassive black holes. This reignites the giant black holes that drive quasars.
      For Hubble, staring into the quasar 3C 273 is like looking directly into a blinding car headlight and trying to see an ant crawling on the rim around it. The quasar pours out thousands of times the entire energy of stars in a galaxy. One of closest quasars to Earth, 3C 273 is 2.5 billion light-years away. (If it was very nearby, a few tens of light-years from Earth, it would appear as bright as the Sun in the sky!) Hubble’s Space Telescope Imaging Spectrograph (STIS) can serve as a coronagraph to block light from central sources, not unlike how the Moon blocks the Sun’s glare during a total solar eclipse. Astronomers have used STIS to unveil dusty disks around stars to understand the formation of planetary systems, and now they can use STIS to better understand quasars’ host galaxies. The Hubble coronograph allowed astronomers to look eight times closer to the black hole than ever before.
      Scientists got rare insight into the quasar’s 300,000-light-year-long extragalactic jet of material blazing across space at nearly the speed of light. By comparing the STIS coronagraphic data with archival STIS images with a 22-year separation, the team led by Ren concluded that the jet is moving faster when it is farther away from the monster black hole.
      “With the fine spatial structures and jet motion, Hubble bridged a gap between the small-scale radio interferometry and large-scale optical imaging observations, and thus we can take an observational step towards a more complete understanding of quasar host morphology. Our previous view was very limited, but Hubble is allowing us to understand the complicated quasar morphology and galactic interactions in detail. In the future, looking further at 3C 273 in infrared light with the James Webb Space Telescope might give us more clues,” said Ren.
      At least 1 million quasars are scattered across the sky. They are useful background “spotlights” for a variety of astronomical observations. Quasars were most abundant about 3 billion years after the big bang, when galaxy collisions were more common.
      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 (STScI) in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
      Explore More

      Science Behind the Discoveries: Quasars


      Science Behind the Discoveries: Black Holes


      Monster Black Holes are Everywhere

      Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contacts:
      Claire Andreoli (claire.andreoli@nasa.gov)
      NASA’s Goddard Space Flight Center, Greenbelt, MD
      Ray Villard
      Space Telescope Science Institute, Baltimore, MD
      Science Contact:
      Bin Ren
      Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, France
      Share








      Details
      Last Updated Dec 05, 2024 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Astrophysics Astrophysics Division Goddard Space Flight Center Hubble Space Telescope Quasars Keep Exploring Discover More Topics From Hubble
      Hubble Space Telescope


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


      Hubble’s Night Sky Challenge



      Hubble Gravitational Lenses



      Hubble Lithographs


      View the full article
    • By NASA
      Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions The Solar System The Sun Mercury Venus Earth The Moon Mars Jupiter Saturn Uranus Neptune Pluto & Dwarf Planets Asteroids, Comets & Meteors The Kuiper Belt The Oort Cloud 3 min read
      Sols 4732-4735: I’ll Zap You, My Pretty, and Your Pebble Too
      NASA’s Mars rover Curiosity used its Mast Camera (Mastcam) to capture this image, with a horizon of platy, dark-toned bedrock at the forefront, on Nov. 20, 2024 at 05:54:55 UTC. Curiosity acquired the image on sol 4369 — Martian day 4,369 of the Mars Science Laboratory mission. NASA/JPL-Caltech/MSSS Earth planning date: Friday, Nov. 22, 2024
      For more than a year, NASA’s Curiosity rover has been climbing through layers of sulfate-rich rock in Gale Crater, where alternating thick light- and dark-toned bands are visible by satellite. After a successful 24.55-meter drive (about 81 feet), Curiosity traversed across a light-toned band into a dark-toned one, entering a workspace that contains the characteristic features of these dark-toned bands: platy, dark-toned material interbedded with lighter-toned bedrock. The origin of this dark-toned, platy material remains a mystery. To help solve it, the Geology and Mineralogy Theme Group focused the weekend’s science plan on continuing our documentation of the sedimentary textures, structures, and chemistry of this bedrock, aiming to uncover clues about the processes that formed the dark-toned, platy material. My role as Keeper of the Geology Plan meant keeping track of all the geology-related requests, which made for a busy day!
      To investigate further, we plan to brush away surface dust from a section of light-toned bedrock and capture detailed images using the Mars Hand Lens Imager (MAHLI). This close-up view will be paired with chemical and mineralogical analysis using the Alpha Particle X-Ray Spectrometer (APXS). Meanwhile, Mastcam will focus on two nearby outcrops nicknamed “Hanging Valley Ridge” 1 and 2, where the dark-toned platy material is visibly layered within the light-toned bedrock. ChemCam will add to the data by zapping both the brushed light-toned area and the dark-toned material to work out their compositions and compare the two.
      In addition to studying the sulfate layers, we’re continuing our long-term investigation of Gediz Vallis Ridge, believed to be a remnant of an ancient debris channel that we’ve been investigating for some time. To build on our previous observations, we’ve planned a Mastcam mosaic and a long-distance Remote Micro-Imager (RMI) observation to further document its morphology and sedimentary structures. Interestingly, we’ve also identified a dark-toned pebble in our workspace that could have been transported from Gediz Vallis Ridge. To test this idea, we’ll use ChemCam to zap the pebble to work out its composition and compare it to the dark-toned material in the outcrop.
      While Curiosity focuses on the Martian surface, we’re also monitoring the planet’s atmosphere. The Environmental Theme Group is using the rover’s downtime to conduct a series of dust- and cloud-monitoring activities. One highlight of the weekend plan is an approximately 30-minute ChemCam passive sky observation, which will help us study atmospheric conditions in Gale Crater.
      As Americans prepare for Thanksgiving here on Earth, the Curiosity team is gearing up for a special holiday “mega plan.” This seven-sol schedule will keep the rover hard at work, ensuring that science and exploration continue while the team enjoys their celebrations. Stay tuned to see what this plan has in store next week!
      Written by Amelie Roberts, Ph.D. candidate at Imperial College London
      Share








      Details
      Last Updated Dec 02, 2024 Related Terms
      Blogs Explore More
      2 min read You Are Now Arriving at ‘Pico Turquino’


      Article


      5 hours ago
      2 min read Sol 4370-4371: All About the Polygons


      Article


      1 week ago
      3 min read Sols 4368-4369: The Colors of Fall – and Mars


      Article


      2 weeks ago
      Keep Exploring Discover More Topics From NASA
      Mars


      Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited…


      All Mars Resources


      Explore this collection of Mars images, videos, resources, PDFs, and toolkits. Discover valuable content designed to inform, educate, and inspire,…


      Rover Basics


      Each robotic explorer sent to the Red Planet has its own unique capabilities driven by science. Many attributes of a…


      Mars Exploration: Science Goals


      The key to understanding the past, present or future potential for life on Mars can be found in NASA’s four…

      View the full article
  • Check out these Videos

×
×
  • Create New...