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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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November 2025

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That’s no comet…

Wang Chao from Jinan, Shandong, China

… that’s a megaconstellation. The photographer captured this satellite train moving across the sky near Ulanqab City in China’s Inner Mongolia Autonomous Region. The image is a stack of 40 frames taken with a Nikon DSLR and 14mm lens; each exposure was 20 seconds at f/2 and ISO 1600.