Looking for a sky event this week? Check out our full Sky This Week column. October 22: Check out the California Nebula The ...

Mercury is quickly dropping out of sight, so catch this early-morning planet while you still can. Today you’ll find the solar system’s smallest world just 3° high in the east 20 minutes before sunrise ...

Mercury will be farthest from the sun on Tuesday (Aug. 19), granting early risers a perfect opportunity to spot the fleet-footed world somewhat separated from the glare of our parent star. Mercury ...

Several planets, including Mercury, Mars, Venus, Uranus, Neptune, Saturn, and Jupiter, are visible this month. Saturn's moon Titan will cast its shadow on Saturn twice during July. Neptune will be ...

This article first appeared on Wired.com. On August 10, six planets — Mercury, Venus, Jupiter, Saturn, Uranus, and Neptune — will line up in an arc in the night sky. Four of these planets — Mercury, ...