ULA’s famed Atlas V 501 rocket left Space Launch Complex 41 at Cape Canaveral Space Force Station. The two-hour launch window was pushed to 2:06 p.m. ET. Originally, it was set for 2 p.m. ET.

The Arecibo Observatory’s suspended equipment platform collapsed just before 8 a.m. local time on December 1, falling more than 450 feet and crashing through the telescope’s massive radio dish ...