The James Webb Space Telescope and the Chandra X-ray Observatory have captured the clearest image yet of a galaxy cluster in the making, seen when the universe was only one billion years old.
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A 'Blaze Star' That Vanishes for 80 Years May Reappear in 2026—Here’s How to See It
Here's how travelers can be ready if a once-in-a-lifetime nova finally flares.
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