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 ...

The planet Mercury may be hot, but it appears to be cooling down. That's the conclusion of a new study that looked for the kinds of features on Mercury that can form as the surfaces of planets ...

The closest world to the Sun has some extreme surface structures, steep hills and cliffs, which have long been suspected to ...

Shrinking planet Mercury is still getting smaller, new research finds The first evidence of Mercury's shrinkage came in 1974 when the Mariner 10 mission transmitted pictures to Earth.

Planets that will retrograde into December are Mercury, Mars, Jupiter, Uranus and Neptune. Retrograde calendar for 2024 and 2025 Mercury is in retrograde now through Dec. 15, the last for 2024.

NASA's MESSENGER spacecraft launched 20 years ago, on August 2, 2004, and although its mission ended in 2015, MESSENGER's observations of the Sun-scorched planet are still yielding new discoveries ...

Feb. 28: Seven planets – Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune. (The last time all seven planets aligned was on April 8 during the total solar eclipse).

Mercury has shrunk by7 km. Most of this happened long ago, but now we have evidence that it continues. Mercury: shrinking planet is still getting smaller – new research ...