NASA’s SPHEREx observatory completes stunning 1st cosmic map

NASA’s SPHEREx has mapped the entire sky in 102 infrared colors, which are invisible to the human eye but can be used to reveal different features of the cosmos. This image features a selection of colors emitted primarily by stars (blue, green, and white), hot hydrogen gas (blue), and cosmic dust (red). Image via NASA/ JPL-Caltech.

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NASA originally posted this article on December 18, 2025. Edits by EarthSky.