Pluto's giant moon Charon may have had a buried ocean. In July of 2015, NASA's New Horizons spacecraft will be the first to visit Pluto and Charon, and will provide the most detailed observations to date.
Ring of fire: Known as a 'prominence eruption', this is a loop of gas heated to an extremely high temperature. Twisted magnetic fields on the Sun's surface cause the gas to be shaped like this. This image was captured by the satellite on March 30
S’COOL – Students’ Cloud Observations Online Great website from NASA with dozens of printables, lesson plans & activities to study and learn about cloud formations, plus an interactive way to report your own local cloud observations to the site to share with others.