By Steve Gorman LOS ANGELES, May 14 (Reuters) - NASA's Psyche probe was headed for a close encounter with Mars on Friday and a planned gravity boost to set the spacecraft on its final course to the
By Steve Gorman
LOS ANGELES, May 14 (Reuters) - NASA's Psyche probe was headed for a close encounter with Mars on Friday and a planned gravity boost to set the spacecraft on its final course to the solar system's largest known metallic asteroid, tho... [2994 chars]