This image of Mercury passing in front of the sun was captured on November 8, 2006 ... Not only is sunlight around Mercury ...

What planet appears close to the moon? It depends on the night, but throughout the year each of the five closest planets will ...

A Cold Moon hangs in the sky while Jupiter still shines bright and the Geminid meteor shower peaks in the sky this week.

This January, the seven visible planets will align in the sky in a “planet parade.” The rare celestial event will start just ...

Winter begins with the solstice on Dec. 20-21, at 1:21 a.m., during our longest night. There are plenty of dark skies in ...

If you’re a Snapchat Plus user, you might have spotted the Friend Solar Systems feature, which allows users to see what position they are in their best friends’ list. Snapchat is a popular app ...

In a few days, on the Dec. 21, the Earth will reach the point in its orbit where the northern end of its axis is leaning ...

Humankind accomplished new feats in space this year, including scooping up some of the moon’s farside and launching a probe to Jupiter’s moon Europa.