The two planets orbiting a star 1,110 light-years away are the biggest exoplanets ever found with a density lower than cotton candy, and may be mostly made of hydrogen and helium. Astronomers have ...

Looking ahead: Future searches using data from TESS and Gaia could target the lower-density edges of stellar streams to locate intact planetary systems. The work explores how a star’s birthplace ...

Physicists led by the University of Iowa have documented in the finest detail to date how energy from the sun interacts with Earth's magnetic field, which could yield greater insight into solar ...

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Need some good news on a Friday after a long week? The Earth may not be engulfed by the expanding fireball of the dying sun, which has long been assumed to be our home planet's ultimate fate, ...

Water is everywhere — and yet it remains one of the most astonishing substances in the universe. It covers most of our planet’s surface, flows through every living cell, and drives the weather systems ...

Discovering two orbiting the same star. That is exactly what astronomers have done, finding two extrasolar planets, or exoplanets, that are super-puff siblings orbiting the same star. Both planets, ...