computus
ephemeris
armilla
armillary sphere
classical planet
zodiac
Pleiades
Pyramid
Great Pyramid
Great Pyramid of Giza
Pyramids of Egypt
Crab Nebula
pseudogroup
heavenly body
robust association of massive baryonic objects
subconstellation
triquetrum
house
orb
planetary geology
Hypatia
Harlow Shapley
Shapley
supernebula
uranometry
Ophiuchus
planetarium
period
uranography
open cluster
astrometeorologist
circumsaturnian
Asaph Hall
galaxy cluster
cometology
globular cluster
common chickweed
Hall
maid's hair
Ptolemy
cosmogeology
Claudius Ptolemaeus
Cl*
oligogalacturonate
Maria Mitchell
Phoenix
astrophoto
Mitchell
barycenter
King Arthur's Round Table