Deep-Space Photos: Hubble's Greatest Hits

The Hubble Space Telescope is completing its 22nd year in space
NASA / ESA

Old Age Home
Messier 9 is a spherical formation that contains about a quarter of a million stars, located near the center of our galaxy. If the Tarantula Nebula is a stellar nursery, Messier 9 is a retirement home. Its stars are up to 10 billion years old—twice as old as our own sun.

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