Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

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

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Scientists at NASA for the first time have been able to observe the make up of Pluto and other small and icy celestial bodies ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

Jess Thomson is a Newsweek Science Reporter based in London UK. Her focus is reporting on science, technology and healthcare. She has covered weird animal behavior, space news and the impacts of ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

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 ...

This may explain the strange properties of the orbits of our solar system's planets ... warped the orbits of many planets. More NASA, ESA, Caltech / ISTOCK / GETTY IMAGES PLUS "[T]he puzzle ...

Getty Images The different orbital speeds of the planets in our Solar System means several of them can occasionally line up in the same part of the sky at the same time (Credit: Getty Images ...