Cosmology

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neighborhood of stars packed tightly together (illustrated)

ALTERNATE UNIVERSE   A neighborhood of stars packed tightly together (illustrated) might heat interstellar space enough for an orphaned planet wandering nearby to have liquid water on its surface and, therefore, potential for life.

distant galaxy

GOING THE DISTANCE  The most distant confirmed galaxy (blue) is seen as it was when the universe was 650 million years old in this image from the Hubble Space Telescope. 

Westerlund 2

EYE IN THE SKY  A stellar nursery 20,000 light-years from Earth known as Westerlund 2 showcases the Hubble Space Telescope’s sharp vision in an image taken in honor of the observatory’s 25th anniversary.

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