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  1. NASA's Roman to Peer Into Cosmic 'Lenses' to Better Define Dark Matter

    June 12, 2025Release ID: 2025-203 Missions: Roman

    The Nancy Grace Roman Space Telescope will identify over 160,000 gravitational lenses, which magnify background galaxies that existed earlier in the universe, in search of more information about dark matter.

    Graphic shows a simulated Roman Space Telescope image with four pullouts to show examples of gravitationally lensed galaxies.

  2. Found: First Actively Forming Galaxy as Lightweight as Young Milky Way

    December 11, 2024Release ID: 2024-116 Missions: Webb

    This galaxy, which is stretched and magnified, glitters with 10 distinct star clusters that formed at different times.

    Horizontal split down the middle. At left, thousands of overlapping objects at various distances are spread across this galaxy cluster. A box at bottom right is enlarged on the right half. A central oval identifies the Firefly Sparkle galaxy, a line with 10 dots in various colors.

  3. NASA's Webb Reveals Distorted Galaxy Forming Cosmic Question Mark 

    September 04, 2024Release ID: 2024-128 Missions: Webb

    Astronomers are astounded by a rare cosmic alignment showcasing highly magnified star-forming regions in distant galaxies.

    Amid a field of galaxies, a repeated, elongated red galaxy forms a shape like the top of a question mark, with another galaxy positioned like the question mark’s dot. In each occurrence, another white, clumpy galaxy with an overall circular shape appears perched on top of the red galaxy. A very bright foreground galaxy appears to the right of the bottom curve of the question mark shape. To the lower right, among other galaxies, another occurrence of the galaxy pair appears, unaffiliated with the question mark shape.

  4. NASA's Roman to Use Rare Events to Calculate Expansion Rate of Universe

    February 07, 2024Release ID: 2024-202 Missions: STScI, Roman

    Lensed supernovae offer precise, independent measurement

    A field of galaxies on the black background of space. Some are blue and white, others glow yellow. In the middle of the field is a cluster of five yellowish spiral and elliptical galaxies that form a foreground galaxy cluster. There is one spiral galaxy just below the cluster that has a yellow-whiteish core and is surrounded by diffuse blue material. This galaxy is outlined by a white box, and lines extend from the box’s corners that leads to an enlarged view at the right. Four arrows point at yellow faint points of light that circle the central glow of the galaxy.

  5. NASA's Webb, Hubble Combine to Create Most Colorful View of Universe

    November 09, 2023Release ID: 2023-146 Missions: Webb, Hubble

    The result: A vivid landscape of galaxies along with more than a dozen newfound, time-varying objects.

    A field of galaxies on the black background of space. In the middle, stretching from left to right, is a collection of dozens of yellowish spiral and elliptical galaxies that form a foreground galaxy cluster. Among them are distorted linear features, which mostly appear to follow invisible concentric circles curving around the center of the image.

  6. Webb Reveals Colors of Earendel, Most Distant Star Ever Detected

    August 09, 2023Release ID: 2023-132 Missions: Webb

    Observations hint at companion star

    A black background is scattered with hundreds of small galaxies of different shapes, ranging in color from white to yellow to red. Some galaxies, mostly the redder galaxies, are distorted, appearing to be stretched out or mirror imaged. Just a little bit above the center, there is a bright source of light, a star, with 8 bright diffraction spikes extending out from it. Below the star are several noticeably fuzzy white galaxies that resemble cotton balls – these are part of a galaxy cluster. To the lower right of the star is a particularly long, red, thin line stretching from one o’clock to 7 o’clock. This is the Sunrise Arc.

  7. Webb Spotlights Gravitational Arcs in 'El Gordo' Galaxy Cluster

    August 02, 2023Release ID: 2023-119 Missions: Webb

    New image reveals galaxy groups, smudges, and dusty distant objects.

    A black background is scattered with hundreds of small galaxies of different shapes, ranging in color from white to yellow to red.

  8. NASA's Webb Uncovers New Details in Pandora’s Cluster

    February 15, 2023Release ID: 2023-107 Missions: Webb

    Astronomers are "star struck" by Webb’s deep-field image of the megacluster

    A crowded galaxy field on a black background, with one large star dominating the image just right of center. Three areas are concentrated with larger white hazy blobs on the left, lower right, and upper right above the single star. Scattered between these areas are many smaller sources of light; some also have a hazy white glow, while many other are red or orange. Even without zooming in, different galaxy shapes are detectable, like spirals, ovals, and arcs.

  9. For the First Time Hubble Directly Measures Mass of a Lone White Dwarf

    February 02, 2023Release ID: 2023-004 Missions: Hubble

    Astronomers Use a Trick of Nature to 'Weigh' a Dead Star

    Diagram titled “Hubble measures deflection of starlight by a foreground object.” Diagram includes an illustration of the Hubble Space Telescope observing a distant star whose light curves around another object—a white dwarf star—in the foreground. The diagram shows the real position of the observed star, the light path of that star, and the apparent (“observed”) position of the star. The white dwarf is in the center of the diagram, on a grid that appears to be warped downward under the enormous mass of the white dwarf. Hubble is toward the lower right on the diagram, at the 5 o’clock position relative to the white dwarf. It is pointing up toward the 12 o’clock position, where the star appears to be (“observed star position”). A straight dashed line connects the observed star position with the telescope. The real star position is at 11 o’clock. A solid line curves from the real star position, around the white dwarf, to the telescope.

  10. Hubble Captures 3 Faces of Evolving Supernova in Early Universe

    November 09, 2022Release ID: 2022-054 Missions: Hubble

    Blast from the Past Caught in Episodes Due to Gravitational Lensing

    The left panel shows the portion of Abell 370 where the multiple images of the supernova appeared. Panel A, a composite of Hubble observations from 2011 to 2016, shows the locations of the multiply imaged host galaxy after the supernova faded. Panel B, a Hubble picture from December 2010, shows the three images of the host galaxy and the supernova at different phases in its evolution. Panel C, which subtracts the image in Panel B from that in Panel A, shows three different faces of the evolving supernova. Using a similar image subtraction process for multiple filters of data, Panel D shows the different colors of the cooling supernova at three different stages in its evolution.

  11. NASA’s Webb Delivers Deepest Image of Universe Yet

    July 12, 2022Release ID: 2022-035 Missions: Webb

    Exquisite new data will transform our understanding of the early universe

    Image showing thousands of distant galaxies of different shapes, sizes, colors, and brightness, with a scattering of bright foreground stars.

  12. NASA’s Webb Produces the Most Detailed Image of the Early Universe to Date

    July 11, 2022Release ID: 2022-038 Missions: Webb

    Infrared light shows the deepest, sharpest view of distant galaxies ever obtained

    Image showing thousands of distant galaxies of different shapes, sizes, colors, and brightness, with a scattering of bright foreground stars.

  13. Record Broken: Hubble Spots Farthest Star Ever Seen

    March 30, 2022Release ID: 2022-003 Missions: Hubble

    A lucky cosmic alignment has revealed a single source of light in the first billion years after the big bang, setting up a major confirmation for the James Webb Space Telescope in its rookie year.

    Field of stars and galaxies with inset of lensed star along arc

  14. 'Double' Galaxy Mystifies Hubble Astronomers

    October 07, 2021Release ID: 2021-046 Missions: Hubble

    Galaxy Cluster's Gravity Produces Mirror Images of Distant Galaxy Behind It

    Three magnified images of a distant galaxy are seen embedded in a cluster of galaxies.

  15. Hubble Snapshot of "Molten Ring" Galaxy Prompts New Research

    September 23, 2021Release ID: 2021-051 Missions: Hubble

    A Classic "Einstein Ring" Is Produced Through the Power of a Natural Lens in Space

    Galaxy curving around its spherical companion, GAL-CLUS-022058s is located in the southern hemisphere constellation Fornax.

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