Astronomy is a branch of physics investigating celestial bodies and phenomena.
A day is defined as the time it takes a planet to make one rotation on it's axis.
In astronomy, a year is defined as the time it takes a planet to make one full orbit around the sun. It is equivalent to the orbital period of a planet, and is typically expressed in terms of Julian Year (which is equal to one Earth year).
Anything outside the Earth is astronomy.
astronomy, astrophysics
In positional astronomy ,two celestial bodies are said to be in opposition when they are on opposite sides of the sky,viewed from given place which is usually the Earth.
Astronomy is the science which studies natural non-biological physical structures that exist outside the Earth's atmosphere.
According to the Oxford Dictionary, astronomy is defined a the branch of science that deals with celestial objects, space, and the physical universe as a whole. In other words, astronomy deals with all bodies in space (such as stars, planets, galaxies, etc.), and basically the entire universe. There are many different branches of astronomy such as astrophysics (deals with the physics of the universe) or planetary science (deals with our local Solar System).
A day is defined as the time it takes a planet to make one rotation on it's axis.
An astronomer is a scientist specializing in the field of astronomy, which is the physical science that studies celestial bodies and phenomena.
In astronomy, a year is defined as the time it takes a planet to make one full orbit around the sun. It is equivalent to the orbital period of a planet, and is typically expressed in terms of Julian Year (which is equal to one Earth year).
Gerald North has written: 'Astronomy in depth' -- subject(s): Astronomy 'Mastering Astronomy' 'Astronomy explained' -- subject(s): Astronomy 'Mastering astronomy'
Probably a satellite used for astronomy observations.Probably a satellite used for astronomy observations.Probably a satellite used for astronomy observations.Probably a satellite used for astronomy observations.
The proper name for the study of stars is astronomy. A person who studies stars is an astronomer.
astronomy, astrophysics
Anything outside the Earth is astronomy.
J. B. Sidgwick has written: 'Introducing astronomy' -- subject(s): Astronomy, Constellations 'Astronomy for night watchers' -- subject(s): Astronomy 'Observational astronomy for amateurs' -- subject(s): Astronomy, Observers' manuals
Laurence W. Fredrick has written: 'Astronomy' -- subject(s): Astronomy 'An introduction to astronomy' -- subject(s): Astronomy