Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

Mercury currently appears as a bright "evening star" in the southwestern sky at sunset. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Mercury ...

If you've never sighted this rocky little world for yourself, you'll never get a better opportunity than right now to see it. When you purchase through links on our site, we may earn an affiliate ...

Mercury will reach its greatest eastern elongation on Oct. 29, marking one of the best evenings to see the planet this fall as it appears farthest from the sun's glare in the twilight sky. As the ...