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Press Release Listing

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  1. Hubble Solves Merger Mystery From Milky Way’s Early Years

    August 17, 2026Release ID: 2026-015 Missions: Hubble

    Astronomers find strong evidence for a massive merger 1.8 billion years earlier than the oldest previously known significant merger.

    An illustration of two galaxies in the midst of a collision against a dark, star-filled background. The collision takes up the middle third of the illustration. On the right, a larger galaxy is viewed at an angle from 11 o’clock to 4 o’clock, with a white-yellow core surrounded by mottled brown dust lanes and faint bluish spiral arms. To the left, a smaller, bright blue-white galaxy is stretched into a curved, hook-like shape as gravity distorts it. A broad, glowing bridge of pale blue gas and stars extends off the galaxy at the left, while wispy streams extend above and below the larger galaxy at the right. The words “Artist’s Concept” appear in the lower left corner.

  2. NASA’s Hubble Discovers First of Star Cluster’s Missing Black Holes

    July 13, 2026Release ID: 2026-017 Missions: Hubble

    Call it the case of the missing black holes.

    A Hubble image of globular star cluster Omega Centauri, which looks like a dense field of stars. Some stars appear a bit larger and brighter than others; most appear blue, orange, or yellow. The colors appear uniformly distributed, like grains of sand. Stars toward the cluster’s center are packed closer together, creating a more luminous area at the globular cluster’s core. A small red square frame is superimposed on the cluster near the image’s center. It connects to a square pullout in the top-right corner, which shows the outlined area in greater detail. Among the blue- and orange-colored stars is small blue-white dot highlighted by a small red circle.

  3. STScI Scientists Surprised to Find Brightness ‘Gap’ in Ancient Star Cluster

    June 03, 2026Release ID: 2026-405 Missions: STScI

    Tools developed at STScI for the Hubble Space Telescope were critical to this discovery.

    This astronomical image is speckled with thousands of stars against the black background of space. Most stars are visible only as white pinpoints. The great majority of stars are crowding the image’s center, which appears as an irregular round shape. Most stars in the center of this cluster are whiter, and those along periphery edges yellower. The stars across the entire image range in color from blue to white to yellowish red. A few of the stars appear a bit larger and brighter than the rest, with six diffraction spikes.

  4. NASA’s Hubble Identifies One of Darkest Known Galaxies

    February 18, 2026Release ID: 2026-007 Missions: Hubble

    The elusive object dubbed CDG-2 may be composed of 99% dark matter.

    Two images side by side. At left, a field of space with a dozen white foreground stars and small, yellow background galaxies. An area at center is outlined with a dashed red circle surrounded by a white box. Lines extend from the box to a pullout at right containing faint, grainy white light surrounded by a red circle labeled “Candidate dark galaxy – diffuse emission.” Four white dots are circled in blue and labeled globular clusters.

  5. NASA's Hubble Finds Strong Evidence for Intermediate-Mass Black Hole in Omega Centauri

    July 10, 2024Release ID: 2024-015 Missions: Hubble

    Elusive Black Hole Tucked Away in Heart of Star Cluster

    An image of the globular cluster Omega Centauri, a collection of myriad stars colored red, white, and blue on the black background of space.

  6. NASA's Roman to Search for Signs of Dark Matter Clumps

    January 17, 2024Release ID: 2024-201 Missions: STScI, Roman

    The Roman Space Telescope’s fine resolution and panoramic views will allow researchers to examine streams of stars pulled from globular star clusters.

    An illustration of the Andromeda galaxy takes up about one third of the view. A few irregularly shaped lines representing globular cluster streams are present. Some globular cluster streams are shown with gaps.

  7. Hubble Sees a Glittering Globular Cluster Embedded Inside Our Milky Way

    September 07, 2023Release ID: 2023-021 Missions: Hubble

    Snowball of Stars Shines Through Clouds of Dust and Gas

    This image shows a compact beehive-like structure of hundreds of thousands of stars crowded together. Because of scattering by interstellar dust, the stars on the left side of the image appear redder. The stars toward the right side of the image are bluish-white. The image is sprinkled with bright blue foreground stars. There is also a smattering of bright red giant stars across the image.

  8. NASA's Hubble Hunts for Intermediate-Sized Black Hole Close to Home

    May 23, 2023Release ID: 2023-016 Missions: Hubble

    A Dark Central Mass is Lurking at the Hub of a Glittering Stellar Island

    Thousands of bright points of light on a black background fill the field of view. They appear somewhat more concentrated near the center of the image. They have a variety of colors, with the most prominent stars appearing blue or yellow-orange. The brighter stars also display four diffraction spikes.

  9. Hubble Discovers Hydrogen-Burning White Dwarfs Enjoying Slow Aging

    September 06, 2021Release ID: 2021-050 Missions: Hubble

    Stellar Dead-Enders Get A New Lease On Life

    Side by side of two clusters with densely packed blue, red and white stars.

  10. Hubble Uncovers Concentration of Small Black Holes

    February 11, 2021Release ID: 2021-008 Missions: Hubble

    Collapsed Stars Hide Out In the Core of a Globular Cluster

    Image of globular star cluster NGC 6397 containing blue stars, red giant stars, and a number of small white objects

  11. What Does the Milky Way Weigh? Hubble and Gaia Investigate

    March 07, 2019Release ID: 2019-16 Missions: Hubble

    Wayward star clusters are used to weigh our home galaxy.

    Illustration of a blue and pink spiral galaxy in the center, surrounded by white dots of different sizes.

  12. Hubble Accidentally Discovers a New Galaxy in Cosmic Neighborhood

    January 31, 2019Release ID: 2019-09 Missions: Hubble

    Isolated star-city is a fossil from the early universe.

    Hubble Accidentally Discovers a New Galaxy in Cosmic Neighborhood

  13. Hubble Uncovers Thousands of Globular Star Clusters Scattered Among Galaxies

    November 29, 2018Release ID: 2018-44 Missions: Hubble

    Survey will allow for mapping of dark matter in huge galaxy cluster

    Hubble Uncovers Thousands of Globular Star Clusters Scattered Among Galaxies

  14. Hubble Makes the First Precise Distance Measurement to an Ancient Globular Star Cluster

    April 04, 2018Release ID: 2018-24 Missions: Hubble

    Refined stellar yardstick helps astronomers improve stellar evolution models

    Hubble Makes the First Precise Distance Measurement to an Ancient Globular Star Cluster

  15. Dark Matter Goes Missing in Oddball Galaxy

    March 28, 2018Release ID: 2018-16 Missions: Hubble

    Galaxy was expected to contain 400 times more dark matter than observations show

    Dark Matter Goes Missing in Oddball Galaxy

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