Four prominent celestial objects — the moon, a bright planet and two bright stars — will come together to form a "celestial ...

Sky This Week is brought to you in part by Celestron. Friday, July 4Mercury reaches its greatest eastern elongation (26°) from the Sun at 1 A.M. EDT this morning. You can view the tiny planet in the ...

Mercury is notoriously difficult to see from Earth, thanks to its proximity to the Sun. But on July 4, Mercury reaches its greatest eastern elongation, meaning the planet will be at its farthest ...

Summer is here, and Mercury goes retrograde from July 17 until August 11 — the retrograde begins after the full moon lunar phase this month, with no shortage of passed-down mythologies and theories.

The sun's poles. ESA. The images are viewable above or in a YouTube video on ESA's channels. In the video, you can see the view that we Earthlings generally see before the video transitions to the ...