The sun is unique in that it's the only star in our solar system. Up to 85% of stars have at least one companion star. The sun contains over 99% of the mass of our entire solar system.

While the solar system is defined by the gravitational influence of the Sun, what lies above is a vast and largely unexplored region filled with fascinating phenomena.

Scientists have unlocked one of the solar system’s many secrets from an unexpected source: a planetarium show opening to the public on Monday. At the American Museum of Natural History last fall ...

For centuries, astronomers have sought to understand the formation and evolution of the solar system and the dynamics that govern it. In particular, there is the long-standing question of whether ...

Earth’s orbital distance from the Sun is called an astronomical unit. 2017 OF201 is currently located at a distance of 90.5 astronomical units from the Sun, meaning 90.5 times as far as Earth.

Its size is estimated to be a bit smaller than Ceres, which is the smallest of the solar system's five recognized dwarf planets and has a diameter of about 950 km. Pluto, the largest of those ...

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.

They modeled a variety of conditions, from systems like our Solar System with a mix of gas and ice giants to more exotic systems including those with two suns. What they discovered was a recurring ...

Jupiter, the largest planet in the solar system, was 2 to 2.5 times bigger in its earlier life, according to new research. Credit: NASA / JPL-Caltech / SwRI / MSSS / Tanya Oleksuik Jupiter, the ...

Planet Nine, if it exists, would have to be a little over six times Earth’s mass, with an orbital period of about 7,400 years. The newly cataloged minor planet is big, but not Planet Nine big.

University of Central Florida (UCF) scientists and their collaborators discovered new insights into the formation of distant icy objects in space beyond Neptune, offering a deeper understanding of ...