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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 Webb, Hubble Reveal History of Relic of Milky Way’s Formation

    June 16, 2026Release ID: 2026-123 Missions: Webb, Hubble

    New research shows that Terzan 5 contains four separate generations of stars, confirming it as the prototype of a “bulge fossil fragment.”

    A dramatically crowded starfield that looks like a just-shaken snow globe. The black background of space, which is clearer at the edges, is covered by thousands of tiny white, orange, and blue points of light, which are stars. The stars are most concentrated in the center, forming a roughly circular orb, and sparser at the edges of the image. Several larger orange stars, particularly those largest near the edges of the frame, have prominent diffraction spikes.

  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. Glittering Glimpse of Star Birth From NASA's Webb Telescope

    September 04, 2025Release ID: 2025-136 Missions: Webb

    Nearby stellar nursery sheds light on massive star formation

    In what appears as a celestial dreamscape, a blue and black sky filled with brilliant stars covers about two thirds of the image. The stars are different sizes and shades of white, beige, yellow, and light orange. Across the bottom third of the scene is a craggy, mountain-like vista with spire-like peaks and deep, seemingly misty valleys. These so-called mountains appear in varying shades of orange, yellow, and brown. Above their soaring spires is a wispy, ethereal white cloud that stretched horizontally across the scene. Steam appears to rise from the mountaintops and join with this cloud. At the top right corner of the image, a swath of orange and brown structure cuts diagonally across the sky.

  5. NASA's Webb Peers into the Extreme Outer Galaxy

    September 12, 2024Release ID: 2024-131 Missions: Webb

    Among the Milky Way’s outskirts is a firecracker show of star formation.

    At center right is a compact star cluster composed of luminous red, blue, and white points of light. Faint jets with clumpy, diffuse material extend in various directions from the bright cluster. Above and to the right is a smaller cluster of stars. Translucent red wisps of material stretch across the scene. Background galaxies are scattered across this swath of space, appearing as small blue-white and orange-white dots or fuzzy, thin disks.

  6. NASA's Hubble Traces 'String of Pearls' Star Clusters in Galaxy Collisions

    February 08, 2024Release ID: 2024-004 Missions: Hubble

    Long Trail of Clumpy Stars Follows Galaxy Interactions

    This is a picture of a galaxy with a peculiar S-shape. It has a bright milky-white core at the center. Twin arms of blue stars wrap around the core. One arm looks particularly stretched out due to the gravitational tidal pull of a neighboring galaxy. Bright, young, whitish star clusters are strung along the arm like a string of pearls. They formed as a result of the collision process.

  7. NASA's Webb Captures an Ethereal View of NGC 346

    October 10, 2023Release ID: 2023-145 Missions: Webb

    Filaments of dust and gas festoon this star-forming region in a new infrared image from MIRI

    The lower half of this image contains arcs of bluish material that form a boat-like shape. One end of these arcs points to the top right of the image, while the other end points toward the bottom left. Another plume of blue filaments expands from the center to the top left, resembling the mast of a sailboat. Within and extending beyond the boat shape are translucent curtains of pink, which appear atop the boat shape as well and cover most of the image. Stars are noticeably scarce. A couple dozen bright pink patches with six short diffraction spikes are scattered within the blue filaments. Many faint blue dots, or stars, also speckle the background, which is black or dark gray.

  8. 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.

  9. NASA's Webb Uncovers Star Formation in Cluster's Dusty Ribbons

    January 11, 2023Release ID: 2023-101 Missions: Webb

    New Data Provides Insights Into an Early Era of Star Formation

    A star cluster within a nebula. The center of the image contains arcs of orange and pink gas that form a boat-like shape. One end of these arcs points to the top right of the image, while the other end points toward the bottom left. Another plume of orange and pink gas expands from the center to the top left of the image. To the right of this plume is a large cluster of white stars. There are more of these white stars and galaxies of different sizes spread throughout the image.

  10. NASA's Hubble Finds Spiraling Stars, Providing Window into Early Universe

    September 08, 2022Release ID: 2022-025 Missions: Hubble

    Researchers find the spiral may be feeding star formation in a nearby stellar nursery

    Spatial Distribution of NGC 346 Stars Thumbnail: A black field speckled with white stars, and a large, irregularly shaped patch of purple in the center. Within this purple patch are white stars and other white clumps, along with some thin, dark lanes within the right side of the purple patch. The top half of the purple patch is more densely formed and covered in more white stars and other white clumps than the wispy bottom of the patch. Over the top half of the purple patch is a red spiral with a dashed white line running through its center, like a spine. The red spiral increases in thickness as it approaches the tightest point of the spiral. Beneath the densest part of the spiral is the densest concentration of stars.

  11. Hubble's Advanced Camera for Surveys Celebrates 20 Years of Discovery

    March 07, 2022Release ID: 2022-013 Missions: Hubble

    The ACS continues to deliver ground-breaking science.

    Collage of nebulae, stars, galaxy field, and a gaseous planet

  12. 1,000-Light-Year-Wide Bubble Surrounding Earth Is Source of All Nearby, Young Stars

    January 12, 2022Release ID: 2022-006 Missions: STScI

    For the first time, astronomers have retraced the history of our galactic neighborhood, showing exactly how the young stars nearest to our solar system formed.

    Local Bubble's Star-forming Regions

  13. 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.

  14. In Planet Formation, It's Location, Location, Location

    May 28, 2020Release ID: 2020-15 Missions: Hubble

    The Westerlund 2 star cluster's raucous core is no place to form planets.

    In Planet Formation, It's Location, Location, Location

  15. Hubble Explores the Formation and Evolution of Star Clusters in the Large Magellanic Cloud

    September 09, 2019Release ID: 2019-42 Missions: Hubble

    Different structures of star clusters are due to different levels of dynamical aging.

    Hubble Explores the Formation and Evolution of Star Clusters in the Large Magellanic Cloud

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