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One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

After two decades of debate, research confirms that an odd binary star system has an equally odd planetary companion ...

The project cancellation comes after NASA has already invested 15 years and $3.4 billion in the telescope, which is 90% complete.

On Tuesday (May 20), the Seattle-based startup unveiled the outline of the groundbreaking flight, which is called Otter Pup 2 ...

In May last year, the United States government hosted its first-ever “Space Weather Tabletop Exercise,” a hypothetical ...