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

Where else might life exist?

Of course this little planet is really planet Earth in a digitally stitched 360 x 180 degree mosaic captured high in the Chilean Atacama desert.

That's no sunspot. It's the International Space Station (ISS) caught passing in front of the Sun.

Over 4000 planets are now known to exist outside our Solar System.

Better known as Hind's Crimson Star, R Leporis is a rare star in planet Earth's night sky. It's also a shocking shade of red.

برندگان مسابقه طولانی ترین خسوف قرن مشخص شدند.

Just two weeks ago, dark skies over the desert in northern Iran held this alluring celestial vista.