space motion
radial velocity
astrodynamics
aberration
fixed star
capture
asteroseismology
interstellar space
aberration of light
accretion
space velocity
sidereal time
movement
celestial mechanics
Kepler's law of planetary motion
instellation
Kepler's law
stargazing
starfall
stardrift
exosystem
motus peculiaris
third cosmic velocity
synastry
apex of the sun's way
solar apex
semidiameter
apex
starlight
orbital mechanics
megamaser
gravitational collapse
contact binary
proper motion
interplanetary space
Dyson sphere
meteor
infall
apastron
multiple star
black hole
circle
hypergravity
interstellar polarization
immersion
orbit
pulsator
lunar orbit
visual magnitude
gravity well