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Astrophysics
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NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light-years in diameter and approximately 60 million light-years distant.
Physics
History of physics
Classical mechanics
Electromagnetism
Statistical mechanics · Thermodynamics
Quantum mechanics
Relativity
Applied physics
Astrophysics
Atomic, molecular, and optical physics
Biophysics
Condensed matter physics
Geophysics
Nuclear physics
Particle physics
2-degree-Field Galaxy Redshift Survey
2-Micron All-Sky Survey (2MASS)
Bell test · BOOMERanG · Camera obscura experiments · Cavendish experiment · Cosmic Background Explorer (COBE) · Davisson-Germer · Double slit · Foucault pendulum · Franck Hertz · Gravity Probe A · Gravity Probe B · Geiger–Marsden · Homestake experiment · Oil-drop experiment · Michelson-Morley · Neutrino experiment · Sloan Digital Sky Survey · Stern-Gerlach · Wilkinson Microwave Anisotropy Probe
Relativistic Heavy Ion Collider
HERA · LHC
James Webb Space Telescope
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Astrophysics (Greek: Astron – ?st??? - meaning "star", and Greek: physis – f?s?? - meaning "nature") is 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. Among the objects studied are galaxies, stars, planets, extrasolar planets, the interstellar medium and the cosmic microwave background. Their emissions are examined across all parts of the electromagnetic spectrum, and the properties examined include luminosity, density, temperature, and chemical composition. Because astrophysics is a very broad subject, astrophysicists typically apply many disciplines of physics, including mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics. In practice, modern astronomical research involves a substantial amount of physics. The name of a university's department ("astrophysics" or "astronomy") often has to do more with the department's history than with the contents of the programs. Astrophysics can be studied at the bachelors, masters, and Ph.D. levels in aerospace engineering, physics, or astronomy departments at many universities.
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