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This artist’s conception illustrates one of the most primitive supermassive black holes known (central black dot) at the core of a young, star-rich galaxy. Astronomers using NASA’s Spitzer Space Telescope have uncovered two of these early objects, dating back to about 13 billion years ago. The monstrous black holes are among the most distant known, and appear to be in the very earliest stages of formation, earlier than any observed so far. Credit: NASA/JPL-Caltech.

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Credit: Tim Doucette.

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This 2016 Curiosity rover selfie shows the vehicle at the “Okoruso” drilling site on Mount Sharp’s Naukluft Plateau. The Martian scene is a mosaic of images taken with the arm-mounted Mars Hands Lens Imager (MAHLI). Credit: NASA/JPL-Caltech/MSSS. Credit: NASA/JPL-Caltech/MSSS.

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February 2025

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A glob and a star

Massimo di Fusco, data acquired via Chilescope

The globular cluster M68 in Hydra lies at lower left of this image; at upper right is the variable star HD 109799. In 2021, astronomers confirmed the latter to be a member of the γ Doradus class of variable stars, which pulsate with waves driven by gravity, like those like on the surface of water.