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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.

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

NASA’s Hubble Finds a Galaxy that Chose to Stay Single

Astronomers have discovered “Cloud-9”, a starless cloud of gas and dark matter that’s been happily solo for billions of years. Although this cloud has all the ingredients for star formation, Hubble has confirmed that there are no stars inside. 

Understanding these rare solo acts reveals the conditions for galaxy formation and shows that staying simple and starless is a viable choice. Not every cosmic cloud follows the same path.

Learn More about NASA’s Hubble Finds a Galaxy that Chose to Stay Single
A region of space mostly filled with background galaxies, with one prominent star at upper left. A large blob of purple haze occupies much of the field. Within the purple region, an unremarkable area is outlined with a dashed white circle.
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