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

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

This month offers incredible views of six planets, including Venus-Saturn conjunction. See the dates for all of 2025's ...

While the grand spectacle takes place next month, six of the seven planets will appear in the sky at once in a large ...

Finding physical evidence that our planet revolves around the Sun took some clever thinking to prove that this heliocentric model of our solar system represents reality. The idea is ancient.

The Red Planet will be at its closest point to Earth, also known as perigee, on Jan. 12 and will be exactly opposite the sun ...

However, they are not always in the same direction or sector, but rather scattered all around the solar system at varying positions around the ... Notice how they are not necessarily in a straight ...

Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto. If ...