Astrophysics (index)about


(study of the life of the universe)

Cosmology is the study of the origin, the evolution, and the eventual fate of the universe. The term physical cosmology can be used to specify that physical science is the basis of your study. The term cosmos is a synonym for universe.

Current physical cosmology is based on the cosmological principle that sufficiently basic natural laws that apply here also apply to the far reaches of the universe, i.e., objects observed at a distance are assumed to follow such laws. Current thought places the beginning of the universe 13.8 billion years ago, the label being the Big Bang.

The adjective cosmological is often used to mean "involving distances or times when cosmology is relevant", i.e., the early universe and distances at which only the early universe is visible because of the time required for the electromagnetic radiation to reach us. The adjective cosmic has the same meaning (at least roughly) and often which is used seems mere preference, or habit regarding a particular phrase, e.g., cosmological distance versus cosmic distance ladder.

A cosmogony is a theory or model of the origin of the universe.


Referenced by:
Atacama Cosmology Telescope (ACT)
anomalous microwave emission (AME)
adaptive mesh refinement (AMR)
adaptive refinement tree (ART)
band shifting
Big Bang nucleosynthesis (BBN)
Big Bang
ionized carbon fine structure line ([CII])
Canadian Institute for Theoretical Astrophysics (CITA)
Cosmic Lens All-sky Survey (CLASS)
conditional luminosity function (CLF)
coherent light
comoving units
computational astrophysics
cosmic distance ladder
cosmological constant (Λ)
cosmological principle
cosmological time dilation
cosmological zoom simulation
conditional stellar mass function (CSMF)
Dark Energy Spectroscopic Instrument (DESI)
diffuse emission
Deep Lens Survey (DLS)
false vacuum
foreground subtraction
gigayear (Gy)
general relativity (GR)
gravitational wave background (GWB)
halo mass function
halo abundance matching (HAM)
intensity mapping
Institut de radioastronomie millimétrique (IRAM)
Institute of Theoretical Astrophysics (ITA)
Lambda-CDM model (ΛCDM)
light cone
large scale structure (LSS)
luminosity distance (dL)
neutrino (ν)
neutron capture
Navarro-Frenk-White profile (NFW profile)
N-point function
particle horizon
peculiar velocity
radio source counts
redshift (z)
redshift-magnitude relation
scale factor (a)
Supernova Cosmology Project (SCP)
sound speed
standard model
star count
Subaru Telescope
symmetry breaking
Sunyaev-Zel'dovich effect (SZ effect)
timescale (t)
Theory of Everything (TOE)
topological defect
Type Ia supernova
ultra-faint dwarf galaxy (UFD)
weak lensing
Wide-field Multi-object Spectrograph (WFMOS)
Wilkinson Microwave Anisotropy Probe (WMAP)