Astrophysics (index)about

Earth

(third solar system planet from the Sun)

Earth is the third solar system planet from the Sun and the solar system's largest rocky planet. Its temperature and atmospheric pressure are such that liquid water can exist on the surface, which is mostly covered with water. Its atmospheric makeup, with substantial oxygen, is influenced by life on the planet. It is also geologically active, exhibiting plate tectonics. Some characteristics:

Earth's single moon is notable for being nearer to Earth's size and mass (1/4 the radius and 1% the mass) than the moons of the other planets (excluding dwarf planet Pluto and its largest moon, Charon).

As the only planet known to harbor life, observable characteristics of Earth are considered for their potential as biosignatures, e.g., for the study of extra-solar planets. Earth is plainly in the Sun's habitable zone, for which estimates are refined over time as more information is available and considered. Some recent determinations put Earth near the inner edge.

The term Earth is also used for classes of exoplanets that resemble the Earth, such as similar mass and/or constituents.


(planet,solar system)
http://en.wikipedia.org/wiki/Earth

Referenced by:
absorption
absorption line
abundances
Advanced Composition Explorer (ACE)
Atacama Cosmology Telescope (ACT)
adiabatic process
aerosols
airmass
albedo
Alpha Centauri
altazimuth mount
adaptive mesh refinement (AMR)
antenna temperature
galactic anticenter
Anticenter Shell
antimatter
apparent magnitude (m)
apsis
ARIEL
asteroid belt
astrobiology
astronomical quantities
atm
atmosphere
atmosphere formation
atmospheric temperature profile
atmospheric tide
astronomical unit (AU)
aurora
Baade's Window
barycenter
baseline
101955 Bennu
BepiColombo
beta (β)
binary star
binding energy
biofluorescence
biosignature
bolometer
bow shock
bulk silicate ea­rth (BSE)
CAESAR
calcium (Ca)
Callisto
Canis Major Dwarf Galaxy
carbon (C)
carbonate-silicate cycle
carbonate system
Carrington event
carbonaceous chondrite (C chondrite)
chemical equilibrium (CE)
celestial equator
celestial sphere
methane (CH4)
Cherenkov detector
Cherenkov radiation
Canadian Hydrogen Intensity Mapping Experiment (CHIME)
chromosphere
CIG
cloud
carbon dioxide (CO2)
cold trap
Coma Supercluster
core accretion model
correlator
cosmic rays (CR)
crustal magnetism
crustal plates
cryovolcano
Catalina Sky Survey (CSS)
curvature
continuous viewing zone (CVZ)
cylindrical telescope
declination (dec)
diffractive interstellar scintillation (DISS)
double star
Dragonfly
dynamo
earthshine
Earth-sized VLBI
eccentricity (e)
ecliptic
ecliptic coordinate system
reduction potential (Eh)
element
emission
ephemeris
epicycle
equatorial coordinate system
equatorial mount
equilibrium condensation model
equilibrium temperature (Teq)
equinox
escape velocity (Ve)
Euclid
Europa
evaporation
exoearth
extra-solar planet
exosphere
extinction
55 Cancri e (55 Cnc e)
FINESSE
51 Pegasi b (51 Peg b)
flux rope
forbidden line
frame of reference
Fulton gap
Far Ultraviolet Spectroscopic Explorer (FUSE)
Gaia
galactic north
Galileo
Ganymede
gauss (G)
general circulation model (GCM)
geochemistry
geodesic
geomagnetic storm
geosignature
Goddard gravity model (GGM)
giant planet
GJ 1132 b
GJ 1214 b
Gould's Belt
general relativity (GR)
gravimetry
gravitational field
gravity
greenhouse effect
Goddard Space Flight Center (GSFC)
gravitational wave (GW)
habitable zone (HZ)
Hadley cell
Hellings and Downs curve
heliocentric system
Hill radius
HITEMP
HITRAN
homopause
horizontal coordinate system
hot Jupiter (HJ)
hydrocarbon (HC)
hydrodynamics
hydrology
image stabilization
impact
inertial reference frame
in situ
insolation
intensity mapping
internal gravity wave
Io
ionosphere
interplanetary medium (IPM)
interstellar magnetic field (ISMF)
isolation mass
International Ultraviolet Explorer (IUE)
J2
J designator
JUICE
Jupiter
Kelvin waves
Kepler-186f
Kelvin-Helmholtz instability (KHI)
Kozai mechanism
Kuiper Belt (K Belt)
Lacaille 9352
Lagrangian point
Lyman-break galaxy (LBG)
LCROSS
Lego principle
late heavy bombardment (LHB)
LHS 1140
libration
light cone
light echo
LIGO
LINEAR
LONEOS
Love number
local standard of rest (LSR)
Luyten 726-8
magma ocean
magnetic anomaly
magnetic field
magnetometer
magnetosphere
Mars
MarsWRF
mass
mass density
mass extinction
mega-Earth
Mercury
meridian
meteoroid
magnetohydrodynamics (MHD)
gravitational microlensing
microwave
MITgcm
MMRTG
MMX
molecular handedness
moment of inertia factor
moon
Moon formation
Morgan classification
Minor Planet Center (MPC)
solar mass (MSun)
multipole expansion
NASA
near-Earth object (NEO)
Neptune
neutrino (ν)
neutron scattering
ammonia (NH3)
Nearby Supernova Factory (NSNF)
numerical weather prediction (NWP)
obliquity
opposition
orbital element
orbital inclination
orbital period
orbital speed
OSIRIS-REx
polycyclic aromatic hydrocarbon (PAH)
PAH emissions
paleomagnetism
Pan-STARRS
parallax
parsec (pc)
P Cygni profile
photometry
Planck
plane-parallel atmosphere
Planet Nine
planetary differentiation
planetary embryo
planetary migration
planetary protection
planet formation
planet type
plasma frequency
Pluto
polar cyclone
polygonal ground
position angle
potential energy (PE)
precession
primary
projected separation
proper motion
protected region
Proxima b
pulsar timing array (PTA)
Palomar Transient Factory (PTF)
pulsar (PSR)
quasar (QSO)
radar
radial velocity (RV)
radioactive dating
radioactive heating
radiometer
ram pressure
magnetic reconnection
reduced mass
reducing atmosphere
regolith
relativity
radiative forcing (RF)
radio frequency interference (RFI)
right ascension (RA)
ROCKE-3D
rocky planet
Rossby waves
rotation period
Sagittarius Dwarf Elliptical Galaxy (Sgr dE)
Saturn
Schwarzschild radius
scintillometry
spectral energy distribution (SED)
seismic waves
shock wave
sidereal
siderophile
silicate
Solar Maximum Mission (SMM)
SN 1987A (1987A)
Solar and Heliospheric Observatory (SOHO)
solar constant
solar flare
solar storm
solar time
specific angular momentum (J)
SPECULOOS
Spektr-R
SPHEREx
Spitzer Space Telescope (SST)
standard candle
standard gravitational parameter (μ)
Stardust
Starshot
stellar distance determination
stellar rotation
stellar temperature determination
STEREO
stratigraphy
sublimation
Sun
sunspot
super-Earth
superluminal motion
superrotating wind
surface brightness
surface gravity
synchronous orbit
synodic period
synoptic
telluric star
terminator
Transiting Exoplanet Survey Satellite (TESS)
THEMIS
thermal wind
tidal force
tidal locking
tide
time standard
Titan
Titius-Bode law
21cm line
transiting planet
TRAPPIST-1
Triton
terrestrial time (TT)
ultraviolet (UV)
Uranus
Ursa Major II Dwarf
USNO
Van Allen belts
variable star
Vega
Venus
very-high-energy gamma rays (VHEGR)
visible light
volatile material
vegetation red edge (VRE)
water-ice planet
water lines
water vapor planet
watt (W)
weathering
James Webb Space Telescope (JWST)
white dwarf
atmospheric window
Wide-field Infrared Survey Explorer (WISE)
Wilkinson Microwave Anisotropy Probe (WMAP)
zenith
zone of avoidance (ZOA)
zodiacal light
zonal flow

index