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

Could extraterrestrial life exist beyond Mars?  Join NASA’s search for alien life in the outer solar system as we explore ...

The wannabe asteroid, announced on Jan. 2 as 2018 CN41, is actually a Tesla Roadster launched into space years ago by SpaceX ...

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

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 ...

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

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

The scientists think that the yet unseen ninth planet may be a “rogue,” which entered out solar system not at its inception, but long after the fact. The theory of Planet Nine was born out of ...

Jan. 15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike anything found in the Solar System. This provides another piece of the puzzle to ...

Throughout much of January and February, Venus, Mars, Jupiter, Saturn, Uranus and Neptune will be visible splayed out in a long arc ... illustration of all the solar system's planets.