n a sentence
Scientists recently found that a planet may be orbiting Proxima centauri — making it the closest planet outside our solar system.
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constellation Patterns formed by prominent stars that lie close to each other in the night sky. Modern astronomers divide the sky into 88 constellations, 12 of which (known as the zodiac) lie along the sun’s path through the sky over the course of a year. Cancri, the original Greek name for the constellation Cancer, is one of those 12 zodiac constellations.
extraterrestrial Anything of or from regions beyond Earth.