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.

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.

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 ...

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 ...

(The last time all seven planets aligned was on April 8, 2024, during the total solar eclipse). Aug. 29, 2025: Six planets – ...

Canadian astronomers have taken an extraordinary step in understanding how planets are born, using the James Webb Space ...

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

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 ...