Mercury takes only 88 Earth days to orbit the sun.

More than a decade of data about the particles zipping around our sun could be used to solve many mysteries, from the ...

This occurs when the planets' positions in their elliptical orbit around the sun line make them seem like they are close ... but stars will stay in the same fixed patterns relative to each other, ...

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

While planets circle the sun in what's called and heliocentric orbit, they rarely fall together in what appears to the human eye as somewhat of line across the visible horizon. Saturday is one of ...

Each planet follows its unique elliptical orbit around the Sun, governed by the principles ... they can influence tidal patterns and serve as natural laboratories to study gravitational forces.

This occurs when the planets' positions in their elliptical orbit around the sun line make them seem like ... but stars will stay in the same fixed patterns relative to each other, Conafay explains.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to ...