The planet's radius from pole to center has been revised to 66,842 km, and at the equator to 71,488 km. That makes it about 12 km smaller along the poles, and about 4 km smaller at the equator, than ...

A strange, fluffy planet has a group of international scientists puzzled - not only because it's larger than the gargantuan Jupiter but because it's also incredibly light. The celestial body, which ...

Is our Milky Way galaxy home to other planets the size of Earth? Are Earth-sized planets common or rare? NASA scientists seeking answers to those questions recently revealed their discovery. “We went ...

I don't know what the numbers are, but I imagine rocky planets of a certain mass will simply start to collapse on themselves. I have a vague recollection of watching a TV show that said it happens at ...

Researchers led by the University of Maryland have found that the sun's magnetic field is the reason behind the large size of Mercury’s iron core. The study has been published in Progress in Earth and ...

The dichotomy arises during the first 50 million years of planetary history. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Supercomputer ...

Five years ago, astronomers revealed a spectacular collection of other worlds: the TRAPPIST-1 system. Newspapers around the world printed the discovery on their front pages: Astronomers had found that ...

Scientists have revealed intriguing new details about the largest group of roughly Earth-sized exoplanets known to science. A study published in the Planetary Science Journal on Friday demonstrates ...

(CNN) — Just 40 light-years from Earth is a planetary system that has intrigued scientists since its discovery in 2016. While some of the planets in this system will be observed by the upcoming James ...