Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

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

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

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

Pluto-Charon Formation Scenario Mimics Earth-Moon System ... solar data sets to develop a revised solar composition that potentially reconciles ... Swirling Polar Vortices Likely Exist on the Sun ...

A shortcut for New Yorkers to spot some of the planets is to look for them when they are near the moon. On Feb. 1, Venus will ...

While planets circle the sun in what's called and heliocentric orbit, they rarely fall together in what appears to the human ...

It is thus only fitting for a goddess to be named for none other than the door hinge: Cardea. And now, thanks to Clay ...

I pick out North America’s celestial highlights for the week ahead (which also applies to northern hemisphere mid-northern ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...