Dawn Spacecraft Successfully Enters Orbit Around Huge Asteroid
Vesta, Up Close NASA's Dawn spacecraft obtained this image with its framing camera on July 17. It was taken from a distance of about 9,500 miles away from the protoplanet Vesta. Each pixel in the image corresponds to roughly 0.88 miles. NASA After a somewhat harrowing waiting period, NASA confirmed over the weekend that its Dawn spacecraft entered orbit around the giant asteroid Vesta. All apparently went according to plan, but NASA had to wait a while to make sure, because Dawn could not communicate with Earth while its ion thrusters were firing. Engineers estimate the space rock - which scientists consider a protoplanet that never finished forming - captured the spacecraft in its gravitational field around 1 a.m. Saturday morning (Eastern time). As it entered orbit, Dawn snapped this photograph, the closest-ever picture of Vesta. Click here to fully embiggen. Vesta is thought to be the source of a large number...