extragalactic
Outside our galaxy
Extragalactic means located or originating outside our galaxy, the Milky Way.
The term appears in astronomy to describe distant objects like other galaxies, quasars, and cosmic phenomena beyond our galactic boundaries: extragalactic nebulae, extragalactic radio sources.
The signal's extragalactic origin suggested it came from billions of light-years away.
Luminous active galactic core
- superclusterLargest gravitationally bound structures
- AndromedaNearest spiral galaxy
- MagellanicOf a Portuguese explorer
- redshiftWavelength stretch from recession
Hubble · telescope · observatory · astrophysics · nebula · supernova · black hole · gravitational lensing
Distant or controller
- farawayAt great distance
- far-flungScattered over vast areas
- distantFar away or aloof
- beyondFarther than something
outer · deep space · unreachable · vast · immense · cosmic scale · inconceivable · unfathomable
Force accelerating universal expansion
- dark matterLightless cosmic mass
- big bangLoud explosive noise
- cosmic inflationUniverse's first exponential stretch
- superclustersMassive galaxy cluster formations
filaments · voids · multiverse · cosmogony · expansion · observable universe
Being from outer space
- alienNon-native being
- space operaDramatic sci-fi in cosmos
- warp driveHypothetical superluminal propulsion system
- starshipFictional interstellar vessel
cosmic horror · first contact · interstellar · otherworldly · space exploration · Lovecraftian
quasar
Luminous active galactic core
- superclusterLargest gravitationally bound structures
- AndromedaNearest spiral galaxy
- MagellanicOf a Portuguese explorer
redshift · Hubble · telescope · observatory · astrophysics · nebula · supernova · black hole · gravitational lensing · Messier
remote
Distant or controller
beyond · outer · deep space · unreachable · vast · immense · cosmic scale · inconceivable · unfathomable
dark energy
Force accelerating universal expansion
- dark matterLightless cosmic mass
- big bangLoud explosive noise
- cosmic inflationUniverse's first exponential stretch
superclusters · filaments · voids · multiverse · cosmogony · expansion · observable universe
extraterrestrial
Being from outer space
- alienNon-native being
- space operaDramatic sci-fi in cosmos
- warp driveHypothetical superluminal propulsion system
starship · cosmic horror · first contact · interstellar · otherworldly · space exploration · Lovecraftian
extragalacticgalactic
Relating to stellar systems
stellar · interstellar · planetary · solar · intergalactic