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

Stargazers in the U.S. will find the slender form of the crescent moon roughly 20 degrees above the western horizon right at ...

Friday, July 4 Mercury reaches its greatest eastern elongation from the Sun, standing 26° from our star at 1 A.M. EDT. We’ll ...

On July 4, Mercury will reach its greatest eastern elongation from the Sun, making it visible from Earth. While not as bright ...

Felton Davis offered thousands of strangers a close-up view of the Moon and planets orbiting New York City. Now he’s passing ...

Moon phases reveal the passage of time in the night sky. Some nights when ... is half-illuminated from our point of view. We call it "first quarter" because the moon has traveled about a quarter of ...

The astronauts who planted their feet on the moon were outfitted in the same glaring white as a wedding dress.” ...

Rubin Observatory begins 10-year sky survey to uncover dark matter, track asteroids, and build a detailed view of our ...

The LSST camera at the Vera C. Rubin Observatory has released its jaw-dropping first images, each capturing 45 times the area ...

The nova V462 Lupi was first discovered on June 12 by the Ohio State University-led All-Sky Automated Survey for Supernovae ...

A ghostly white river is coursing over the continent this month. It isn’t fog, and it isn’t cloud. It’s the packed heart of ...

Stargazers, get ready for a truly celestial July! From the stunning appearance of the ‘buck moon’ to a rare glimpse of Pluto, ...