Answer by
dloksel (6)
Tumbling, nonspheroidal, starlike objects, such as satellite related space junk, commonly reflect sunlight. Some meteors, airplanes, space probes, fireworks, and UFO's may also flash. Astronomers take photographs through telescopes to analyze how variable stars, like Mira, vary in brightness. Several telescopic variable stars are flashing stars (pulsars) with a period of a few seconds.