Mercury's Radius Shrank by over 10 km: Japan Team
Tokyo, Sept. 10 (Jiji Press)--Since its birth around 4.6 billion years ago, Mercury's radius has shrunk by over 10 kilometers as the inside of the planet cooled down, a team from Japan's Hokkaido University has found. The team's findings were published in the U.S. science journal Geophysical Research Letters on Thursday. Mercury's radius currently stands at some 2,440 km. Observations by...