Celestial Phenomena and Points

• aberration
• absorption lines
• accretion disk
• altitude
• annular eclipse
• antapex
• anthelion
• apex
• aphelion
• apocenter
• apogee
• arc
• arroyo
• asterism
• atmosphere
• atmospheric layers
• aureole
• aurora
• axis
• azimuth
• basin
• Becklin-Neugebauer object
• Big Dipper
• biosphere
• black hole
• blue moon
• blue shift
• brightline spectrum
• canals
• carbonaeceous chondrites
• celestial equator
• celestial sphere
• chondrite
• chromosphere
• collision
• comet tail
• conjunction
• constellation
• corona
• cosmic noise
• cosmic rays
• crater
• crescent moon
• declination
• deferent
• dust
• eclipse
• ecliptic
• ecosphere
• electromagnetic spectrum
• emission lines
• equinox
• exosphere
• extragalactic
• first point of Aires
• flash spectrum
• flocculus
• force field
• Fraunhofer lines
• full moon
• galactic equator
• galactic noise
• galactic pole
• geomagnetic axis
• gibbous moon
• gravitation
• gravitational collapse
• halo
• horizon
• interacting galaxies
• intercrater plain
• intergalactic
• intergalactic medium
• interplanetary
• interplanetary medium
• interstellar cloud
• ionosphere
• lines of force
• Little Dipper
• luminosity
• lunar
• lunar eclipse
• lunar occultation
• magnetic field
• magnetosphere
• mare
• Mare Imbrium
• meridian
• Messier object
• meteor shower
• microwave background radiation
• nadir
• new moon
• nodes
• Northern Lights
• nutation
• occultation
• Olympus Mons
• optical double
• orbit
• Orientale basin
• outer space
• outgassing
• parhelic circle
• penumbra
• perigee
• perihelion
• perturbation
• phase
• photosphere
• plasma
• polar cap
• precession
• primordial black hole
• proper motion
• quarter moon
• radiant
• radio wave
• ray
• redshift
• regolith
• retrograde motion
• rift valley
• ring plain
• ring system
• Saturn’s rings
• Seeing
• semimajor axis
• solar
• solar corona
• solar eclipse
• solar flare
• solar nebula
• solar wind
• solstice
• space
• space velocity
• spectrum
• spicule
• spiral arm
• star cloud
• sunspot
• surface temperature
• synodic month
• syzygy
• Tharsis ridge
• tidal friction
• tides
• transmit
• umbra
• Van Allen radiation belts
• vertical circle
• visible spectrum
• waning moon
• waxing moon
• zenith
• zodiacal light
• zone
• zone of avoidance