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3 weeks ago
Supermassive Black Hole in the Milky Way Galaxy
From a distance, our galaxy would look like a flat spiral, some 100,000 light years across, with pockets of gas, clouds of dust, and about 400 bill...
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3 weeks ago
The Promise of Kepler-22b
Exciting news from the Kepler mission yesterday! Here's what happened: they discovered ...
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Center within the Center
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Zoom In to an object and you'll see an atom. And within it, there's a nucleus at the center and subatomic particles that orbits the nucleus.
Zoom Out and you'll see our solar system and within our solar system, there's a sun at the center and planets that orbits it.
Zoom Out Further and you'll s...