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CELESTIAL MECHANICS

   • altitude
   • analemma
   • annual variation
   • antinode
   • antisolar point
   • apastron
   • apex
   • aphelion
   • apoapsis
   • apogee
   • apolune
   • apparition
   • apsis
   • argument of perihelion
   • ascending node
   • aspect
   • astrodynamics

   • barycenter
   • Barycentric Dynamical Time (TDB)
   • Besselian elements
   • Besselian year
   • big LEO
   • braking ellipses
   • bulge of the Earth

   • capture
   • celestial coordinates
   • celestial equator
   • celestial mechanics
   • celestial pole
   • celestial sphere
   • central meridian
   • chaotic control
   • chaotic orbit
   • circular orbit
   • circular velocity
   • circumlunar trajectory
   • circumplanetary space
   • circumterrestrial space
   • cislunar
   • Clarke Belt
   • colure
   • conic sections
   • conjunction
   • contact
   • convergent point
   • co-orbital
   • Coriolis effect
   • co-rotation
   • cosmic year
   • culmination

   • dawn-dusk orbit
   • day
   • decaying orbit
   • declination
   • deep space
   • descending node
   • direct ascent
   • direct flight
   • direct motion
   • drift orbit
   • dynamical time

   • Earth-orbit rendezvous
   • eccentric orbit
   • eccen
   • ecliptic
   • ecliptic coordinates
   • ellipse
   • elliptic ascent
   • elongation
   • ephemeris
   • epoch
   • equation of light
   • equation of the center
   • equation of time
   • equator
   • equatorial coordinates
   • equatorial orbit
   • equinox
   • escape energy
   • escape trajectory
   • escape velocity
   • escape-velocity orbit
   • extragalactic reference frame

   • flyby
   • focus (orbital)
   • following
   • freefall

   • galactic year
   • general precession
   • GEO
   • geocentric
   • geodetic precession
   • geospace
   • geostationary orbit (GSO)
   • geosynchronous orbit
   • geosychronous/geostationary transfer orbit (GTO)
   • GMT (Greenwich Mean Time)
   • graveyard orbit (GSO)
   • gravipause
   • gravisphere
   • gravity assist
   • gravity gradient
   • gravity gradient stabilization
   • greatest elongation
   • GSO

   • halo orbit
   • helical rising
   • heliocentric
   • heliocentric coordinates
   • HEO
   • Hohmann orbit
   • horizon
   • horizon coordinates
   • hour
   • hour angle
   • hour circle
   • hyperbola
   • hyperbolic orbit
   • hyperbolic velocity

   • inclination
   • inequality
   • International Celestial Reference Frame (ICRF)
   • invariant plane

   • Julian date (JD)
   • Julian epoch

   • Keplerian orbit
   • Keplerian rotation curve
   • Kepler's equation
   • Kepler's laws of planetary motion

   • Lagrangian orbit
   • Lagrangian point
   • latitude variation
   • leading hemisphere
   • leap second
   • LEO (low Earth orbit)
   • libration
   • limb correction
   • line of nodes
   • Lissajous orbit
   • little LEO
   • local horizon
   • local hour angle
   • local standard of rest
   • local time
   • local vertical
   • longitude at the epoch
   • longitude of the ascending node
   • longitude of perihelion
   • lower transit
   • lunar-orbit rendezvous
   • Lyapunov orbit

   • major axis
   • mean motion
   • mean motion resonance
   • mean orbital elements
   • mean place
   • mean sun
   • MEO (medium Earth orbit)
   • meridian
   • Metonic cycle
   • minor axis
   • Molniya-type orbit
   • month

   • nadir
   • neutral point
   • New Style date
   • nodal line
   • node
   • noon
   • North Pole
   • nutation

   • obliquity
   • opposition
   • orbit
   • orbit decay
   • orbital curve
   • orbital element
   • orbital energy
   • orbital migration
   • orbital period
   • orbital plane
   • orbital resonance
   • orbital rotation
   • orbital velocity
   • osculating orbit

   • parabola
   • parabolic orbit
   • parabolic velocity
   • parallactic displacement
   • parking orbit
   • PAW ascent
   • periapsis
   • periastron
   • perigalacticon
   • perigee
   • perihelion
   • perilune
   • perturbation
   • planetocentric and planetographic coordinates
   • Platonic year
   • polar distance
   • polar orbit
   • pole
   • posigrade motion
   • position angle
   • preceding
   • precession
   • prime meridian
   • proper motion

   • quasistationary orbit

   • radius vector
   • rectangular coordinates
   • regression of nodes
   • retrograde
   • revolutione
   • right ascension

   • Saros
   • seasons
   • secular
   • secular acceleration
   • secular parallax
   • semi-major axis
   • semi-synchronous orbit
   • sidereal time
   • solar apex
   • Sothic cycle
   • spherical astronomy
   • spherical coordinates
   • stationary point
   • statistical parallax
   • suborbital
   • subsolar point
   • sun-syncronous orbit
   • synchronous rotation
   • synodic
   • synodic period
   • syzygy

   • topocentric coordinates
   • trailing hemisphere
   • trajectory
   • transfer ellipse
   • translunar
   • tropic
   • Tropic of Cancer
   • Tropic of Capricorn
   • True of Date (TOD)
   • true pole
   • two-body problem

   • upper transit
   • UT (Universal Time)

   • vertical circle
   • VHO (very high orbit)
   • visible horizon

   • walking orbit

   • zenith
   • zodiac