The Ring Nebula (M57)'s central star, a challenging observational target, was first noted around 1795 by Friedrich von Hahn using a 12-inch reflector, despite being missed by other observers with ...
BENGALURU: The 12-metre diameter unfurlable giant radar antenna reflector on the National Aeronautics and Space Administration (NASA)-Indian Space Research Organization (ISRO) Synthetic Aperture Radar ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback