When millions of people turn off their lights for Earth Hour each year, something remarkable happens in the night sky above ...

July's third quarter moon phase occurs at 8:38 EDT (0038 GMT) on July 17. At this moment, skywatchers in the northern ...

The reason city folk can't see a true starry sky is light pollution. Photos of Earth at night from space show entire ...

The possible aurora borealis coincides with the Perseids meteor shower, with hundreds of meteors likely visible in the night ...

Yet that single image encapsulates a whole slew of reasons why the Earth's night sky is never completely dark. The ESO's Very Large Telescope (VLT) complex, as viewed from the VISTA telescope site.

Mercury is notoriously difficult to see from Earth, thanks to its proximity to the Sun. But on July 4, Mercury reaches its ...

One of the most famous and active celestial events of the year will begin streaking across the Australian night sky from Thursday, but sky watchers may find this year’s display underwhelming with a ...

Earth appears as a morning star, Jupiter is higher in the sky, and the Martian moons Phobos and Deimos are low on the horizon. Space.com / Starry Night Dec. 30, 2003, 4:59 PM EST / Source : Space.com ...

A comet likely last seen when Neanderthals walked Earth could soon dazzle in the night sky. Here's how to see it now, or wait 80,000 years.

The Red Planet will rise in the east as the sun sets in the west and will appear larger and brighter over Earth throughout the night. On the evening of Wednesday (Dec. 7) and into the early ...