NASA launched the $446 million Messenger on its nearly 5 billion-mile mission in 2004. It will fly by Mercury two more times, this October and September 2009, before settling into orbit around in 2011. Messenger will take pictures, measure the planet's tenuous atmosphere, hills and valleys and unusual magnetic field "†Mercury is the only solar system planet other than Earth to have a magnetosphere.
...for the mathmatically challenged that equals about 142,694 mph for 4 years or 2378 mpminute or about 40 mpsecond
...for the mathmatically challenged that equals about 142,694 mph for 4 years or 2378 mpminute or about 40 mpsecond