Welcome to the Universe

Discover the universe: Learn about the history of the cosmos, what it's made of, and so much more.

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Worlds beyond our solar system.

Giant balls of hot gas that burn for millions to billions of years. 

Concentrations of matter with gravity so powerful not even light can escape.

Looking like a pinwheel, this face-on spiral galaxy holds a bright-white core at image center. Arms curve outward from the core. They hold dark dust lanes and bright star-forming regions. All on a black background dotted with stars.

Collections of stars, planets, and vast clouds of gas and dust bound together by gravity.

Repair Kit for NASA’s NICER Mission Heading to Space Station

In May 2023, the NICER X-ray telescope developed a “light leak,” where unwanted sunlight began entering the telescope. Photos taken on board the International Space Station revealed damage to several thermal shields beneath the telescope’s sunshields. Now a repair kit is on the way to the station, where astronauts will install patches during a spacewalk.

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A zoomed-in photograph of NICER.
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