Astrophysics
Astrophysics
Astrophysics (/ˌæstrəˈfɪzɪks/) is a branch of space science that applies the laws of physics and chemistry to explain the birth, life and death of stars, planets, galaxies, nebulae and other objects in the universe. It has two sibling sciences, astronomy and cosmology, and the lines between them blur.
Etymology
The term "astrophysics" was first used in the 19th century, and is derived from the Greek words "astro" meaning "star" and "physics" meaning "nature".
Related Terms
- Astronomy: The scientific study of celestial objects, space, and the physical universe as a whole.
- Cosmology: The science of the origin and development of the universe.
- Galaxy: A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
- Nebula: A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
- Physics: The natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.
- Chemistry: The branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
- Stars: A fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
- Planets: A celestial body moving in an elliptical orbit around a star.
External links
- Medical encyclopedia article on Astrophysics
- Wikipedia's article - Astrophysics
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