On a large, rocky world in a far-off solar system, a year goes by in just half a day.

Astronomers are continually finding unique planets in deep space, and a new survey just revealed 15 new planets, including a unique super-Earth. These are rocky worlds some 30 to 70 percent bigger than Earth, but not quite as massive as planets like Neptune. This latest super-Earth find, dubbed TOI-1798 c, is a rarity because it travels extremely close to its star — so close that an orbit takes about 12...

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