Astronomers have made a groundbreaking discovery of three Earth-sized planets orbiting within a compact binary star system. This rare configuration, where planets circle two stars simultaneously, ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth than the hypothetical Planet X, which astronomers have been hunting for ...

WASHINGTON — NASA is revamping a major series of Earth science missions, delaying some and relying more on international partners for others to reduce costs. As part of NASA’s fiscal year 2025 budget ...