Amateur astronomy
Amateur astronomy is a hobby where participants enjoy observing, studying, or imaging celestial objects in the sky using the unaided eye, binoculars, telescopes, and other gadgets. Although scientific research may not be their primary goal, some amateur astronomers contribute to citizen science by monitoring variable stars, double stars, sunspots, and occultations of stars by the Moon or asteroids, as well as by discovering transient astronomical events, such as comets, galactic novae or supernovae in other galaxies.