Star Clusters

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

June 16, 2026

Researchers using two of humanity’s most powerful observatories — NASA’s James Webb and Hubble Space Telescopes — have…

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Scores of gleaming stars ringed in neon pink stretch across the frame, highlighting a cluster where stars are between one and three million years old. Brick-orange dust clouds along the bottom edge illustrate the raw materials of this active stellar nursery.

June 1, 2026

This image of Westerlund 2 released on March 19, 2026, features Chandra X-ray Observatory data (pink) and infrared…

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A large, long portion of one of the spiral arms in galaxy M51. Red-orange, clumpy filaments of gas and dust that stretch in a chain from left to right comprise the arm. Shining cyan bubbles light up parts of the gas clouds from within, and gaps expose bright star clusters in these bubbles as glowing white dots. The whole image is dotted with small stars. A faint blue glow around the arm colors the otherwise dark background.

May 22, 2026

This near-infrared image released on May 6, 2026, shows a section of one of the spiral arms of…

PPhysics

May 16, 2026

Some of the biggest black holes ever picked up through gravitational waves may not have formed in a…

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NASA Finds Young Stars Dim in X-rays Surprisingly Quickly

April 15, 2026

Scientists have found that young stellar cousins of our Sun are calming down and dimming more quickly in…

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A winter scene fit for a holiday greeting card. Above what appears to be a fantastical snowy mountainscape, is a brilliant blue sky packed with colorful lights. The golden mountainscape is in fact part of the nebula NGC 6357, as captured by NASA's James Webb Space Telescope. The green, red, and golden lights in the blue sky above are bursts of high-energy X-rays from active stars, detected by Chandra.

January 28, 2026

Data from Chandra adds red, green, and blue twinkling lights in this Dec. 22, 2025, image of Pismis…

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January 12, 2026

Researchers at the University of British Columbia and Dalhousie University have found a young galaxy cluster that appears…

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December 19, 2025

For the first time, astronomers using NASA’s Fermi Gamma-ray Space Telescope have traced a budding outflow of gas…

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A close-in view of a spiral galaxy that faces the viewer. Brightly lit spiral arms swing outward through the galaxy’s disk, starting from an elliptical region in its center. Thick strands of dark reddish dust spread across the disk, primarily along the spiral arms. The arms also contain many glowing, pink-red spots where stars form and clumps of bright-blue star clusters. Beyond its spiral arms, the galaxy is a bit fainter and speckled with blue stars.

November 21, 2025

Today’s NASA/ESA Hubble Space Telescope image features the spiral galaxy NGC 4535, which is situated about 50 million…

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$Stars in a star cluster shine brightly blue, with four-pointed diffraction spikes radiating from them. The center shows a small, crowded group of stars while a larger group is partially visible on the right side of the image. The nebula is mostly thick, smoky clouds of gas, lit up in blue tones by the stars. Clumps of dust hover before and around the stars; they are mostly dark but lit around their edges where the starlight erodes them.$

September 29, 2025

This NASA/ESA Hubble Space Telescope image released on Sept. 12, 2025, features a cloudy starscape from an impressive star cluster.…

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Scores of gleaming white orbs and tiny specks pack the blackness of space, surrounded by a purple haze, and mottled golden clouds.

September 16, 2025

Westerlund 1, the biggest and closest “super” star cluster to Earth, dazzles in this image released on July…

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

Pretty in Pink – NASA

Webb Studies Star Clusters – NASA

The biggest black holes grow by crashing into each other over and over again

NASA Finds Young Stars Dim in X-rays Surprisingly Quickly

Chandra, Webb Catch Twinkling Lights

Astronomers spot a hot galaxy cluster that defies existing cosmic theory

NASA’s Fermi Spots Young Star Cluster Blowing Gamma-Ray Bubbles

Hubble Seeks Clusters in ‘Lost Galaxy’

Hubble Surveys Cloudy Cluster – NASA

An Eye-catching Star Cluster – NASA