Astronomer
Astronomer
Astronomer (/əˈstrɒnəmər/; from Greek: ἀστρονομία) is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either observational (by analyzing the data) or theoretical astronomy.
Etymology
The word "astronomer" comes from the Greek word "astron," which means "star," and "nomos," which means "law." Thus, an astronomer is someone who studies the laws of the stars.
Related Terms
- Astrophysics: The branch of astronomy that deals with the physics of the universe, including the physical properties of celestial objects, as well as their interactions and behavior.
- Cosmology: The science of the origin and development of the universe. Modern cosmology is dominated by the Big Bang theory, which brings together observational astronomy and particle physics.
- Planet: A celestial body moving in an elliptical orbit around a star.
- Star: A fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
- Galaxy: A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
- Comet: A celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
- Observational Astronomy: The practice of observing celestial objects by using telescopes and other astronomical apparatus.
- Theoretical Astronomy: The use of analytical models to describe astronomical objects and phenomena.
External links
- Medical encyclopedia article on Astronomer
- Wikipedia's article - Astronomer
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