The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

ESA’s decade-long Milky Way Gaia mapping mission still has tons of data to release over the next few years. Expect surprises.

Have you ever wondered why the planets in our solar system align along a flat plane? Discover the science behind this cosmic arrangement, from the formation of the protoplanetary disk to the forces ...

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

The car, launched in 2018 on a SpaceX rocket’s upper stage, is one of many human-made objects in deep space that could ...

In October 2020, a van-sized robotic spacecraft briefly touched down on the surface of Bennu, a 525-meter-wide asteroid 320 million kilometers from Earth.

The research, yet to be peer-reviewed, sheds light on what could have changed the orbits of several planets in the solar ...

Scientists studying samples that NASA collected from the asteroid Bennu found a wide assortment of organic molecules that ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

Chinese rocket scientist reveals blueprint for ‘incredible project’ to build solar power station in space using super heavy ...