A new trail in this southern Arizona city plots the most visitor-friendly astronomy stops—and there are plenty to choose from ...

The night sky tonight and on any clear night offers an ever-changing display of fascinating objects you can see, from stars and constellations to bright planets, the moon, and sometimes special ...

Here's our guide to the night sky as we head into the first week in April, according to NASA and earthsky.org. Monday: Any ...

April skies feature close planet pairings, a bright meteor shower, and stunning views of the ancient star cluster M3.

A green energy plant expected to be built in Chile's Atacama Desert could increase night-time sky brightness at one of the world's most valuable astronomical locations by up to 35%, a new study ...

A stunning blue light likely caused by SpaceX Falcon 9 rocket fuel illuminated the night skies over Europe on Monday.

The moon dims, the meteors fly, and the planets dance—these are the most exciting celestial events happening this month.

Although through much of April it does not rise until after the start of morning twilight, during the last week of the month it finally rises in a dark sky, at the same time it is attaining its ...