Solar System Things
Mercury is Still Shrinking
For many years, scientists believed that Earth was the only tectonically active planet in the solar system. That changed after the Mercury Spacecraft, Messenger, did the first orbital mission at Mercury, mapping the entire planet and getting a look at the features on its surface.
Pluto Has a Bizarre Atmosphere
Data from NASA’s New Horizons found 20 layers of atmosphere extending as high as 1,000 miles above the surface – higher than the Earth’s.