Like all other planets with magnetic fields, Mercury traps harmful radiation in a belt-like shape. But only sometimes.

Mercury was long considered the exception to the rule that magnetic planets have radiation belts similar to Earth's Van Allen ...

A new study estimates Mercury's radius may have shrunk by about 3.9 miles (6.3 kilometers) as the planet cooled over billions ...

View of planet Mercury from space. Space, nebula and planet Mercury. This image elements furnished by NASA. A few evenings ago I found myself in a remote layby in Utah close to Canyonlands National ...

Mercury, the first planet from the Sun - The Forgotten Planet. With the search for life beyond Earth primarily focusing on Mars and the rest of the solar system, it’s easy to forget about the small ...

Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a sun-scorched, metal-rich world with a puzzling magnetic field and lavas unlike ...

Venus dominates the evening sky while Mercury and Jupiter stage a beautiful dawn pairing you won't want to miss.

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com. Why is Venus the hottest planet, whereas Mercury ...

Mercury will retrograde, or appear to be moving backward in the sky, from August 23 through September 15. It's the third of four times Mercury will be moving in retrograde this year. Mercury isn't the ...

The second Mercury retrograde of 2025 is upon us, folks. As a personal planet, Mercury — which governs communication, currency, and exchange — has a direct bearing on our daily lives and intimate ...