Skywatching, the act of observing the sky and its celestial bodies, is a popular pastime for many. However, this term can be replaced with a variety of other synonyms, each conveying a slightly different meaning. Stargazing is a commonly used synonym specifically referring to the observation of stars. Astronomy is a more scientific term that encompasses the study and observation of all celestial objects. Astrophotography refers to capturing images of the sky using a camera. Sky-hunting is a term often used by birdwatchers to refer to observing birds in flight. Celestial observation is a broader term that encompasses any observation of objects in the sky.