A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site CELESTIAL MECHANICS    • altitude    • analemma    • annual variation    • antinode    • antisolar point    • apastron    • 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    • 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    • 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 Related supercategory    • ASTRONOMY AND ASTROPHYSICS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP