Astrophysics

Astrophysics (from the, meaning "star" and , meaning "nature") is the branch of astronomy that deals with the physics of stellar phenomena. It is concerned with the physical properties of celestial objects. Studies include the physical characteristics of the stars and other heavenly bodies, their chemical constitution, light, heat, atmospheres, etc. The determination of the amount and nature of the matter present in the universe is an example of important problem currently studied by astrophysics and cosmology. Observations are typically made with the spectroscope, bolometer, and other instruments, usually used with a telescope.

Topics

 * Anthropic principle
 * Cosmic expansion
 * Cosmological relativity
 * Geomagnetic field decay
 * Geomagnetism
 * Gravity
 * Gravitational time dilation
 * Gravitational lens
 * Equinox precession
 * Helioseismology
 * Oort Cloud
 * Optics
 * Protostars
 * Redshift
 * Speed of light
 * White Hole Cosmology
 * Van Allen belts