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

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

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

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

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 ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

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

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

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

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

NASA's Parker Solar Probe, for example, swoops just a few million miles away from the sun's surface, gathering data about the fiery environment there. But then retreats beyond the orbit of Venus ...

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