A new classification scheme may help us better understand planet formation — including the history of our own family of worlds.

Young, close-orbiting exoplanets known as sub-Neptunes may form farther from their stars and migrate inward or lose their ...

Here's a look at some others who found themselves stuck in space — by choice or not — along with some cool spaceflight ...

Astronomers have discovered the smallest dwarf galaxy ever seen. It is a mystery how the satellite galaxy of Andromeda ...

Astronomers have identified a quartet of small rocky planets orbiting Barnard's star - one of our closest stellar neighbors - ...

Venus will pass between the Earth and sun during what’s called an inferior conjunction. But don’t plan on seeing the linkup.

Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

A quartet of small, rocky exoplanets likely circle Barnard's Star, around 6 billion light-years from Earth, putting them in ...

Four small, newly discovered worlds are less than six light-years away from Earth, and their discovery reinforces a ...

A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new study.

A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system ...