出典:Wikipedia
出典:『Wikipedia』 (2011/03/27 07:08 UTC 版)
Solrad 1, also known as Galactic Radiation and Background 1 (GRAB-1), Sunray 1, and Solrad I, is a satellite which was launched in 1960 as part of the Solrad and Galactic Radiation and Background programs. The satellite is still in orbit.