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NASA confirms Empire State Building-size asteroid at 20,000 mph

NASA has identified an asteroid roughly comparable in size to the Empire State Building, traveling through space at about 20,000 miles per hour, and projected to make a close pass by Earth. The object ...

This Space Telescope’s Entire Job Is to Search For Signs of Life On 20 Distant Planets

Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...