Jump to content

Recommended Posts

Posted
low_keystone.png

It seems like our compulsive universe can be downright capricious when it comes to making oddball-looking things in the cosmos. The latest surprise to Hubble astronomers is a 100,000-light-year-long structure that looks like a string of pearls twisted into a corkscrew shape. This Slinky-like structure forms a bridge between two giant elliptical galaxies that are colliding. The "pearls" on the Slinky are superclusters of blazing, blue-white, newly born stars. The whole assembly, which looks like a tug-of-war, must result from the gravitational tidal forces present in the collision.

If that's not strange enough, the underlying physics behind the "beads on a string" shape is related to describing the behavior of self-gravitating clumps of gas. It's analogous to the process where rain falls in drops rather than in continuous filaments from clouds. It's called the Jeans instability, and it can play out on distance scales of enormous orders of magnitude – from being inches across to many thousands of light-years in length.

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
      Explore Hubble 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 Universe Uncovered Hubble’s Partners in Science AI and Hubble Science Explore the Night Sky Observatory Hubble Observatory Hubble Design Mission Operations Astronaut Missions to Hubble Hubble vs Webb Team Hubble Team Career Aspirations Hubble Astronauts Multimedia Images Videos Sonifications Podcasts e-Books Online Activities 3D Hubble Models Lithographs Fact Sheets Posters Hubble on the NASA App Glossary News Hubble News Social Media Media Resources More 35th Anniversary Online Activities 2 min read
      Hubble Spies Galaxy with Lots to See
      This NASA/ESA Hubble Space Telescope features the galaxy NGC 7456. ESA/Hubble & NASA, D. Thilker While it may appear as just another spiral galaxy among billions in the universe, this image from the NASA/ESA Hubble Space Telescope reveals a galaxy with plenty to study. The galaxy, NGC 7456, is located over 51 million light-years away in the constellation Grus (the Crane).
      This Hubble image reveals fine detail in the galaxy’s patchy spiral arms, followed by clumps of dark, obscuring dust. Blossoms of glowing pink are rich reservoirs of gas where new stars are forming, illuminating the clouds around them and causing the gas to emit this tell-tale red light. The Hubble observing program that collected this data focused on the galaxy’s stellar activity, tracking new stars, clouds of hydrogen, and star clusters to learn how the galaxy evolved through time.
      Hubble, with its ability to capture visible, ultraviolet, and some infrared light, is not the only observatory focused on NGC 7456. ESA’s XMM-Newton satellite imaged X-rays from the galaxy on multiple occasions, discovering many so-called ultraluminous X-ray sources. These small, compact objects emit terrifically powerful X-rays, much more than researchers would expect, given their size. Astronomers are still trying to pin down what powers these extreme objects, and NGC 7456 contributes a few more examples.
      The region around the galaxy’s supermassive black hole is also spectacularly bright and energetic, making NGC 7456 an active galaxy. Whether looking at its core or its outskirts, at visible light or X-rays, this galaxy has something interesting for astronomers to study!
      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 Sep 04, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Hubble Space Telescope Spiral Galaxies The Universe 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.


      Science Behind the Discoveries



      Hubble Design



      Hubble’s Night Sky Challenge


      View the full article
    • By NASA
      In the sparsely populated Kimberley region of Western Australia, jagged landforms reach like fingers into the turquoise-blue ocean waters. Along the coastline north of Derby, they used to reach even farther. But rising sea levels submerged part of the coastal landscape, giving rise to hundreds of islands and low-lying reefs that compose the Buccaneer Archipelago.NASA/Michala Garrison; U.S. Geological Survey The Operational Land Imager on Landsat 9 captured this image of Buccaneer Archipelago on June 11, 2025. The scene encapsulates the striking interactions between land and water in the area where King Sound opens to the Indian Ocean.
      The powerful tidal currents stir up sediment in shallow areas, producing the beautiful turquoise swirls visible in this image. This power, however, can be hazardous to seafarers and divers as water rips through the archipelago’s constricted passages. One infamous place of turbulence, known as “Hell’s Gate,” lies in the passage between Gerald Peninsula and Muddle Islands.
      Learn more about this archipelago in Western Australia.
      Text credit: Kathryn Hansen
      Image credit: NASA/Michala Garrison; U.S. Geological Survey
      View the full article
    • By NASA
      Explore Hubble 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 Universe Uncovered Hubble’s Partners in Science AI and Hubble Science Explore the Night Sky Observatory Hubble Observatory Hubble Design Mission Operations Astronaut Missions to Hubble Hubble vs Webb Team Hubble Team Career Aspirations Hubble Astronauts Multimedia Images Videos Sonifications Podcasts e-Books Online Activities 3D Hubble Models Lithographs Fact Sheets Posters Hubble on the NASA App Glossary News Hubble News Social Media Media Resources More 35th Anniversary Online Activities 2 min read
      Hubble Homes in on Galaxy’s Star Formation
      This NASA/ESA Hubble Space Telescope image features the asymmetric spiral galaxy Messier 96. ESA/Hubble & NASA, F. Belfiore, D. Calzetti This NASA/ESA Hubble Space Telescope image features a galaxy whose asymmetric appearance may be the result of a galactic tug of war. Located 35 million light-years away in the constellation Leo, the spiral galaxy Messier 96 is the brightest of the galaxies in its group. The gravitational pull of its galactic neighbors may be responsible for Messier 96’s uneven distribution of gas and dust, asymmetric spiral arms, and off-center galactic core.
      This asymmetric appearance is on full display in the new Hubble image that incorporates data from observations made in ultraviolet, near infrared, and visible/optical light. Earlier Hubble images of Messier 96 were released in 2015 and 2018. Each successive image added new data, building up a beautiful and scientifically valuable view of the galaxy.
      The 2015 image combined two wavelengths of optical light with one near infrared wavelength. The optical light revealed the galaxy’s uneven form of dust and gas spread asymmetrically throughout its weak spiral arms and its off-center core, while the infrared light revealed the heat of stars forming in clouds shaded pink in the image.
      The 2018 image added two more optical wavelengths of light along with one wavelength of ultraviolet light that pinpointed areas where high-energy, young stars are forming.
      This latest version offers us a new perspective on Messier 96’s star formation. It includes the addition of light that reveals regions of ionized hydrogen (H-alpha) and nitrogen (NII). This data helps astronomers determine the environment within the galaxy and the conditions in which stars are forming. The ionized hydrogen traces ongoing star formation, revealing regions where hot, young stars are ionizing the gas. The ionized nitrogen helps astronomers determine the rate of star formation and the properties of gas between stars, while the combination of the two ionized gasses helps researchers determine if the galaxy is a starburst galaxy or one with an active galactic nucleus.
      The bubbles of pink gas in this image surround hot, young, massive stars, illuminating a ring of star formation in the galaxy’s outskirts. These young stars are still embedded within the clouds of gas from which they were born. Astronomers will use the new data in this image to study how stars are form within giant dusty gas clouds, how dust filters starlight, and how stars affect their environments.
      Explore More:

      Learn more about why astronomers study light in detail


      Explore the different wavelengths of light Hubble sees


      Explore the Night Sky: Messier 96

      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 Aug 29, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Hubble Space Telescope Spiral Galaxies Stars The Universe 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 Science Highlights



      Hubble’s 35th Anniversary



      Hubble’s Night Sky Challenge


      View the full article
    • By NASA
      Explore Hubble 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 AI and Hubble Science Explore the Night Sky Observatory Hubble Observatory Hubble Design Mission Operations Missions to Hubble Hubble vs Webb Team Hubble Team Career Aspirations Hubble Astronauts Multimedia Images Videos Sonifications Podcasts e-Books Online Activities 3D Hubble Models Lithographs Fact Sheets Posters Hubble on the NASA App Glossary News Hubble News Social Media Media Resources More 35th Anniversary Online Activities 2 min read
      Hubble Observes Noteworthy Nearby Spiral Galaxy
      This NASA/ESA Hubble Space Telescope image features the nearby spiral galaxy NGC 2835. ESA/Hubble & NASA, R. Chandar, J. Lee and the PHANGS-HST team This NASA/ESA Hubble Space Telescope image offers a new view of the nearby spiral galaxy NGC 2835, which lies 35 million light-years away in the constellation Hydra (the Water Snake). The galaxy’s spiral arms are dotted with young blue stars sweeping around an oval-shaped center where older stars reside.
      This image differs from previously released images from Hubble and the NASA/ESA/CSA James Webb Space Telescope because it incorporates new data from Hubble that captures a specific wavelength of red light called H-alpha. The regions that are bright in H-alpha emission are visible along NGC 2835’s spiral arms, where dozens of bright pink nebulae appear like flowers in bloom. Astronomers are interested in H-alpha light because it signals the presence of several different types of nebulae that arise during different stages of a star’s life. Newborn, massive stars create nebulae called H II regions that are particularly brilliant sources of H-alpha light, while dying stars can leave behind supernova remnants or planetary nebulae that can also be identified by their H-alpha emission.
      By using Hubble’s sensitive instruments to survey 19 nearby galaxies, researchers aim to identify more than 50,000 nebulae. These observations will help to explain how stars affect their birth neighborhoods through intense starlight and winds.
      Text Credit: ESA/Hubble
      Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Share








      Details
      Last Updated Aug 21, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Hubble Space Telescope Spiral Galaxies The Universe 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 Astronauts



      Hubble e-Books



      Hubble’s Night Sky Challenge


      View the full article
    • By USH
      The weight of the gods was crushing, their toil beyond endurance. Let the burden pass to humankind! So speak the oldest verses carved into clay, a fragment from the Atrahasis tale of Mesopotamia. Yet what if these divine figures were not simply legends? What if the stories hint at something far older and stranger than we have allowed ourselves to believe? The name Anunnaki comes from the etched symbols of Sumerian records, their lines recounting the deeds of deities who shaped the world and watched over the Earth. 

      From the cradle of ancient Mesopotamia comes a story older than any empire, etched into clay tablets and whispered through time: the tale of the Anunnaki. Were they gods, symbols, or something far stranger visitors from beyond the stars who shaped human civilization? The myths of Sumer speak of creation, rebellion, giants, and a great flood. But when paired with the ancient astronaut theory, these legends take on a new dimension, one that could rewrite human history.  
      Who were the Anunnaki? In the ancient Sumerian texts of Mesopotamia, they are described as the offspring of An, the sky god, and Ki, the earth goddess. Their names appear across the Atrahasis epic, the Enuma Elish, the Epic of Gilgamesh, and the Sumerian King List, etched into clay tablets more than 4,000 years ago. 
      To mainstream historians, the Anunnaki are mythological gods. Yet in the ancient astronaut theory, they were real beings, extraterrestrial visitors who shaped early civilization. 
      Author Zecharia Sitchin popularized the idea that the Anunnaki came from Nibiru, a hidden “twelfth planet” on a long, elliptical orbit. According to his interpretation of Sumerian records, the Anunnaki faced an environmental crisis. Their planet’s atmosphere was failing, and the solution they sought was gold, which could be ground into particles and suspended as a shield. 
      This quest for survival brought them to Earth more than 400,000 years ago. They mined resources, altered life, and may even have engineered humanity itself. 
      The tablets describe how the lesser gods, the Igigi, were forced into back-breaking labor until they rebelled. To replace them, the Anunnaki created humans. 
      In myth, mankind was formed from clay mixed with divine blood. In Sitchin’s interpretation, this was genetic engineering: the fusion of Anunnaki DNA with Homo erectus. The first prototype was Adamu, a name that echoes the biblical Adam. 
      The Sumerian “Edin,” later mirrored in the Hebrew Eden, may not have been a paradise garden but an Anunnaki laboratory outpost. 
      Two Anunnaki brothers shaped humanity’s destiny: Enki – the god of wisdom and waters, often seen as humanity’s ally, granting knowledge. Enlil – stern and authoritarian, seeking control and fearing that humans might grow too powerful. Their rivalry runs through Mesopotamian myth, influencing stories of divine punishment, survival, and human struggle. 
      Over time, some Anunnaki defied the rules and took human women as partners. Their offspring were the Nephilim, giants and “mighty men of renown.” The Book of Enoch calls their fathers the Watchers, led by Shemyaza.  
      According to the stories, these hybrids grew violent, corrupted the world, and became uncontrollable. The solution was drastic: a great flood to wipe the Earth clean. 
      The Atrahasis epic, the story of Utnapishtim in the Epic of Gilgamesh, and the biblical Noah all describe the same event: a chosen man warned by a god, a vessel built to preserve life, animals carried aboard, and birds released to find land. Humanity survived, but weaker, with shorter lifespans, and forever changed. 
      Supporters of the ancient astronaut theory believe the Anunnaki left traces in stone: 
      Mesopotamian ziggurats – described as “bonds between heaven and earth,” possibly landing platforms. 
      The Great Pyramid of Giza – aligned to true north, massive in scale, theorized as a power plant or beacon rather than a tomb. 
      Megalithic monuments worldwide – stone circles, cyclopean walls, and sacred sites possibly linked to Anunnaki influence. 
      The Sumerian King List also suggests a divine legacy, describing rulers with lifespans of thousands of years, perhaps evidence of semi-divine hybrids. 
      Mainstream archaeology sees the Anunnaki as symbolic deities, metaphors for cosmic order and human struggle. But in alternative history, they were real beings, extraterrestrial visitors from Nibiru, who shaped civilization, taught astronomy, metallurgy, agriculture, and law, and left their mark in myths and monuments that endure to this day. 
      Explore the mystery of the Anunnaki—Sumerian gods, Nibiru, genetic engineering, Nephilim, the Great Flood, and the ancient astronaut theory in the video below.
        View the full article
  • Check out these Videos

×
×
  • Create New...