Mercury will reach its greatest eastern elongation, marking the point where it is farthest from the Sun in the evening sky.

Mercury reaches its point of greatest eastern elongation on Friday (July 4), presenting an excellent opportunity to spot the ...

Discover why Earth's farthest distance from the sun coincides with summer heat, then grab your binoculars for a week of ...

Summer is here, and Mercury goes retrograde from July 17 until August 11 — the retrograde begins after the full moon lunar ...

A meteor shower, a planet sighting, and a full moon. Here's how to see all of space's eye-catching activity in July.

They’re not a perfect match, but it’s way too hot on the first planet for us to hop over and confirm for ourselves.

Mercury will retrograde from Dec. 13 through Jan. 2 in the last of four times it appears to move backward in the sky this year. Every planet has in our solar system has retrograded for at least ...

Mercury, our solar system's innermost, unusually iron-rich planet. NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington hide caption ...