Not all planets are small compared to stars. Some grow so massive they approach stellar size, challenging how astronomers ...

Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune ...

CONFIDENCE IN HAPPENING YESTERDAY. NEW MEXICO STATE UNIVERSITY ASTRONOMER RECENTLY SAW SOMETHING UNUSUAL DURING HIS RESEARCH OF SPACE, AND IT COULD HELP US UNDERSTAND HOW PLANETS FORM. VLADIMIR LYRA ...

Thanks to an enormous stroke of luck and serendipitous timing, astronomers were able to calculate the mass and distance of a ...

A giant planet the size of Saturn orbiting a sun-like star has potentially been identified in our nearest neighbouring stellar system, Alpha Centauri. At just four light years from Earth, Alpha ...

One of the biggest recent surprises in astronomy is the discovery that most stars like the Sun harbor a planet between the ...

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 ...

It was almost 100 years ago that Clyde W. Tombaugh discovered Pluto. That was the last planet found until 1992, when humans found another one. But this new planet wasn't in our solar system—it was ...

For centuries our solar system was the only planetary system known to humans. We had no proof other worlds existed beyond those in our own cosmic backyard, and we imagined that if other planetary ...

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 ...