This image shows a huge piece of cheese—sorry, the Moon—over the Sierra Nevada mountains behind Los Angeles, California. The colors of the city skyline and the mountains behind it are stunning.
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NASA's Hubble Space Telescope found definitive evidence of a dwarf galaxy merging with the Milky Way just 2 billion years after the Big Bang.
Don't look up.
The cosmic accelerator can push protons beyond one quadrillion electric volts.
The observatory recently began its 10-year survey of the southern sky using the world's largest digital camera.
The otherwise invisible object revealed itself with a flash of light as it munched on its stellar dinner.
