Ptolemaism
Copernicanism
planetarium
paleodynamics
planetary science
concave
planetesimal hypothesis
planetology
geoheliocentrism
Ptolemaic system
planetary geology
Copernicus
Mikolaj Kopernik
Nicolaus Copernicus
terrestrial time
TT
TDT
celestial globe
terrestrial dynamical time
heliolongitude
ephemeris time
Copernican system
orrery
planetophysics
hetegony
Claudius Ptolemaeus
Ptolemy
planetography
solar telescope
chromatosphere
heliocentrism
selenology
Kepler's law
equinoctinal
astronomics
Akash
equator
Kepler's law of planetary motion
apex
heliolatitude
apex of the sun's way
solar apex
geocorona
sidereal period
synodic period
Inner
apparent time
sphaera recta
cosmologist
astrometry