Although the Ursids are active from Dec. 13 through Dec. 26, the peak night coincides with the winter solstice, which occurs at 10:03 a.m. EST on Dec. 21. Though the two events are totally unrelated, ...

Space telescopes are typically optimized either to study a small patch of the sky across many wavelengths of light or to ...

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Launched in March, NASA's SPHEREx space telescope has completed its first infrared map of the entire sky in 102 colors.