Dawn Spacecraft

The ion-propelled Dawn spacecraft has broken the record for velocity change produced by a spacecraft's engines,breaking the previous record by Deep Space 1's. On June 5,the Dawn Space craft's acceleration go beyond 4.3Km per second,or 15,360Km per hour. Dawn 's 4.9 -billion km odyssey includes exploration of asteroid Vesta and the dwarf planet Ceres. The prospect of an ion-propulsion technology is very bright,which is less powerful than Chemical Rocket Engines but are very efficient.They can last for years before running out of fuel.