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

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

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

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

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

The dark skies during a new moon provide ideal conditions for spotting skywatching targets that would otherwise be outshined by moonlight.

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

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

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 Vera C. Rubin Observatory is poised to discover billions of new astronomical objects, revolutionizing understanding of ...

In the early 1600s, Dutch spectacle maker Jan Lippershey discovered that combining lenses could magnify distant objects.

Regulus is a bright blue star in the constellation Leo, which is often called the 'lion's heart'. It regularly appears close ...