Most planetary systems contain worlds larger than Earth but smaller than Neptune, and the low-density planets around one ...

A four-planet system reveals remarkable insights about how planets form and how they change during their lifetime.

The star system V1298 Tau reveals that many planets begin as large, low-density worlds that slowly shrink and shed their ...

The discovery of an extraordinary multi-planet system has demonstrated that so-called "hot Jupiter" planets may not be lonely giants after all. The findings could force scientists to revise their ...

Now, a new Nature study points to an answer by catching four planets at a stage most systems never show us: The awkward, ...

The Hubble Space Telescope has captured a spectacular new image of the largest and most unusual protoplanetary disk ever ...

An unusual planetary system with three known ultra-low density 'super-puff' planets has at least one more planet, according to new observations. An unusual planetary system with three known ultra-low ...

Astronomers gazing upon a star system not too far from Earth were recently treated to a marvelous discovery: a group of six planets moving around a sun-like star in a seemingly perfect cosmic dance ...

NASA’s Hubble Space Telescope has captured infant planets colliding around Fomalhaut, one of the brightest stars in the night ...

Hubble reveals the largest planet-forming disk ever seen, Dracula's Chivito, showing a chaotic and uneven environment around ...

(WHTM) – When you look into the night sky, you’ll see planes flying by, stars twinkling, and sometimes you’ll see planets. Mercury has 88 days in a year and is a terrestrial planet. The size of ...

Astronomers have detected a rogue planet roughly the size of Saturn wandering alone through the Milky Way. Unlike most ...