Definitions for "GALEX"
Galaxy Evolution Explorer A UV imaging and spectroscopy SMEX (see below) selected in 1997.
The Galaxy Evolution Explorer is an orbiting ultraviolet space telescope that was launched on April 28, 2003. A Pegasus rocket placed GALEX into a nearly circular orbit at an altitude of 697 km (432 miles) and an inclination to the Earth's equator of 29 degrees.