It's exactly one year since a human-made spacecraft made the closest approach to the Sun in history. Called the Parker Solar Probe, the piece of technology came within 3.8 million miles (6.1 million ...
Trappist-1, a star system 40 light-years away, holds seven Earth-sized planets—three in the habitable zone—that ignite our imagination about life beyond the solar system. But how long would it take to ...
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