Here’s what deep-space objects are, what optics you’ll need to see them and how to plan your observing. When you purchase ...

Add Yahoo as a preferred source to see more of our stories on Google. The moon and Venus will shine vividly alongside a bright star in the early morning in a striking celestial rendezvous that should ...

When you look up at the night sky, it appears unchanging. But if you look deep enough you will find that the sky is in fact constantly shifting. Satellites, asteroids and interstellar objects pass by.

If you step outside after sunset, you might catch one of the season’s loveliest celestial meetups as dazzling Venus shimmers ...

Each spring, amateur astronomers attempt the ultimate stargazing challenge—an overnight quest to spot every galaxy, nebula, and star cluster in Charles Messier’s famous catalog. Photographer Alan Dyer ...

The only clocks and calendars our early ancestors had were the motions of objects in the sky. All of us pay some attention to the position of the Sun through the day. Few of us note the position of ...

Something flashed in the sky before humanity had launched its first satellite. Between 1949 and 1957, photographic plates ...

The moon and Venus will shine vividly alongside a bright star in the early morning in a striking celestial rendezvous that should be visible across the U.S. But unless you're willing to wake up before ...