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

The solar system may hold a hidden surprise. Astronomers are investigating the possibility of a mysterious ninth planet, often referred to as Planet Nine. If found, this discovery could change the ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

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 ...

Dec. 19, 2024 — New studies offer a clearer picture of how the outer solar system formed and evolved ... first attempts at interplanetary ... Dec. 9, 2024 — Dust storms on Mars could one ...

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 ...

Join us as we delve into NASA's quest to find extraterrestrial life in the outer solar system. Discover the potential ...

A six-planet alignment or parade will form an arc in the early night sky, peaking in it's visibility Jan. 17-18. We let you ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...