These types of exoplanets are some of the most common in our galaxy - but they've remained mysterious until now.

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class of planets.

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...

Second-Largest Asteroid in the Solar System May Be an Ancient Piece From a Lost Planet, Claim Scientists Space exploration ...

Though they don't orbit around our sun, sub-Neptunes are the most common type of exoplanet, or planet outside our solar ...

This is probably the most convincing evidence for Planet Nine so far. It is believed that this planet is five to ten times ...

NASA scientists have sought to understand planet Jupiter, the gas giant whose mass is more than the rest of the planets in ...

While the spring semester is winding down, the University of Wyoming Harry C. Vaughan Planetarium is amping up its offerings ...