OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is ...

Earth’s companion has allowed astronomers to define lunar cycles, navigate without technology, and understand celestial ...

You soon realize that getting past the Karman Line is one thing ... exploring ruins across your solar system. Your goal is to learn as much about the mysterious alien race, the Nomai, as possible ...

An accidental discovery in an astronomy show offers researchers a new clue about the mysterious Oort Cloud, a large expanse of icy bodies revolving around the sun.

Astronomers have revealed new research showing that millions of new solar system objects are likely to be detected by a brand-new facility, which is expected to come online later this year.

NASA’s PUNCH mission is mapping the solar wind and explosive solar events in 3D, offering new insights into space weather ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

So many unexplored secrets still lie at the outskirts of our solar system, where a potential candidate for a ... The presence of this single object suggests that there could be another hundred or so ...

Are planets in the solar system that are closer to the Sun older ... That place, the ice line – sometimes called the snow line – was in what’s now the asteroid belt, which is between Mars ...

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system now consists of eight planets, nine dwarf planets, 891 confirmed moons or ...

The European Space Agency's Solar Orbiter captured the first-ever images of the sun's south pole in March, which were ...