In an interplanetary first, on July 19, 2013 Earth was photographed on the same day from two other worlds of the Solar System.

Nature photographers and other fans of planet Earth always look forward to the blue hour.

On September 24, a late evening commercial flight from Singapore to Australia offered stratospheric views of the southern hemisphere's night sky.

Is this galaxy jumping through a giant ring of stars?

This phenomenon occurs in the sky over our heads, not the sea.

What's that dark spot on Jupiter?

The Horsehead Nebula is one of the most famous nebulae on the sky.

After sunset on October 3, some of the Solar System's largest moons stood low along the western horizon with the largest planet.

Clouds drift through the sky as the light fades near sunset in this three frame animated gif.

Gorgeous spiral galaxy M33 seems to have more than its fair share of glowing hydrogen gas.