Explore what makes Mercury so mysterious and what scientists are learning from NASA's first Mercury mission in 30 years. For the MESSENGER mission, NASA launched a probe and guided it toward Mercury using a technique called "solar sailing." The probe is studying the make-up of the planet's inner core and surface and measuring its magnetic field. Because Mercury and Earth share some similarities, including evidence of volcanism, scientists hope what they learn about Mercury's evolution will improve their understanding of Earth. Available in both English and Spanish audio, and corresponding closed captions.
Adapted from "Mercury's MESSENGER Reveals Mysteries" /NASA eClips.