Unlike rocky planets such as Mars and Earth, angrites do not have a lot of silicon dioxide. Because of this, astronomers have ...

Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published ...

A NASA probe that had a close encounter with a strange object from another solar system has been declared dead and scientists ...

NASA-supported scientists have provided new information about how the early Earth may have acquired some elements necessary ...

Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying ...

This week's images journeyed from the shimmering Crystal Ball Nebula to the icy south pole of Mars, highlighting beauty and ...

The early solar system may have been far more chaotic than we ever imagined. A new study published in Icarus suggests that ...

New research suggests the moons of Jupiter and Uranus may hint that our planetary neighborhood once had a third ice giant.

Another puzzle piece in how our solar system formed. The post Scientists Spot What Appears to Be a Ring-Shaped “Planet ...

How do you weigh a planet you can't see? Astronomers may have the answer and it involves "reading between the rings," the ...

Astronomers have discovered more than 300 exoplanetary systems that have three or more known planets. Most of these planets are about the same size and spaced close together, earning them the moniker ...

A hot, rocky planet discovered using the Kepler space telescope is the smallest ever found outside our solar system. The new planet, called Kepler-37b, has a radius less than a third the size of Earth ...