Mercury is in what is called a 3:2 spin-orbit resonance with the sun. This means that it spins on its axis two times for every three times it goes around the sun. So a day on Mercury lasts 59 ...

We’ve already had one Mercury retrograde so far in 2025, and we're set to have two more before the year is out. Keep reading ...

Mercury will be in retrograde until Dec. 15, the last of four times it appears to move backward ... closest to the sun, so its daytime temperatures can rise to 800 degrees Fahrenheit.

Some of those questions revolve around solar activity in the 17th century, which was a pivotal time for studying ... he had captured Mercury moving in orbit across the sun in May 1607, but he ...

The BepiColombo spacecraft flew less than 200 miles from Mercury's surface and photographed volcanic plains and icy craters. It's the sixth time the spacecraft — launched in 2018 by the European ...