What can Earth-sized exoplanets teach scientists about the formation and evolution of exoplanets throughout the cosmos? This is what a study recently posted to the arXiv preprint server hopes to ...

In a system with two known planets, astronomers spotted something new: A small object transiting across the sun-sized star. This turned out to be another planet, which was extra hot and Earth-sized.

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

How big it is: 865,000 miles (1.392 million kilometers) across How far away it is: 93 million miles (150 million km) What ...

Astronomers have discovered a new star that is 30 times larger than the sun and could force a major rethink of stellar evolution theories. The star, designated J0524-0336 and located around 30,000 ...

At around 700 times the size of the Sun and over 10,000 ... Betelgeuse has entered a more advanced stage of stellar evolution ...

Artist’s concept of a Neptune-sized planet, left, around a blue, A-type star. UC Berkeley astronomers have discovered a hard-to-find gas giant around one of these bright, but short-lived, stars ...

A red giant star is a dying star in the last stages of stellar evolution. Our own sun will turn into a red giant, expand and engulf the inner planets.

Astronomers have used the Hubble Space Telescope to find evidence of an elusive kind of black hole, one that's about 8,000 times more massive than our sun. What makes this black hole special is ...

Brightest stars in the night sky can strip Neptune-sized planets to their rocky cores A rare find -- a 'warm Neptune' around a bright blue star -- offers clues to the dearth of Hot Neptunes ...

What can Earth-sized exoplanets teach scientists about the formation and evolution of exoplanets throughout the cosmos? This is what a recently submitted study hopes to address as an international ...