Astronomers studying extreme planetary systems have identified worlds so massive that they rival the smallest stars in size.

A large proportion of the most common type of planet in the galaxy could be situated in the habitable "Goldilocks Zone" of their solar system, research has found. Astronomers from the University of ...

Space. It's really, really big. How big is it? Well, according to astronomers, the observable universe is around 92 billion light-years in diameter, but that's all we can see (hence the word ...

AMES, Iowa – Astronomers poring over four years of data from NASA’s Kepler spacecraft have discovered a star that’s 11.2 billion years old and has at least five Earth-size planets. “We thus show that ...

A massive, Jupiter-size planet has been found orbiting a relatively small, low-mass star, surprising astronomers and challenging theories on how planets form. The extrasolar planet, or exoplanet, ...

Astronomers have discovered an Earth-size planet orbiting an ultracool red dwarf star similar in size to Jupiter. The red dwarf, located some 55 light-years away, is 100 times less bright than the sun ...

A distant star system has Milky Way-like spiral arms orbiting it. New research suggests a giant planet may be to blame. When you purchase through links on our site, we may earn an affiliate commission ...

Planets that go rogue orbit no star. They wander the vacuum of space alone, having been kicked out of their star systems by gravitational interactions with other planets and stars. Nobody really knows ...

NASA's forthcoming Nancy Grace Roman Telescope will hunt for "cosmic orphans," starless planets that might even outnumber their orbiting counterparts in our galaxy. When you purchase through links on ...