A team of international astronomers, including a University of Michigan doctoral student, were the first to publish the ...

A cross July 14-15, 1965 (depending on your time zone), the Mariner 4 mission was doing something incredible. This early NASA ...

This new dwarf planet may exist at the edge of the solar system, possibly disproving Planet Nine's existence. This is the story of that newly encountered planet.

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.

Scientists have unlocked one of the solar system’s many secrets from an unexpected source: a planetarium show opening to the public on Monday.

Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a ...

Heavenly questions China extends its reach into the Solar System with launch of asteroid mission Tianwen-2 will first return samples from an asteroid, then explore a mysterious comet-like object.

If the solar system does have a Planet Nine, it is a world that was bullied by its larger siblings, exiled to the far reaches of space and only rescued from oblivion thanks to the intervention of ...

Scientists may have found evidence of a ninth planet hiding out beyond Pluto, but is it actually Planet Nine?

New Minor Planet Spotted Past Pluto, One of the Largest Distant Objects in the Solar System The surprisingly large world has a massive orbit—about 838 times Earth’s distance from the Sun.

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

Super-Earths are common outside the solar system, new study shows by Megan Watzke, Harvard-Smithsonian Center for Astrophysics Editors' notes ...