Apoapsis,
Astronomy,
Coma,
Cosmic dust,
Earth,
Eclipse,
Epoch,
Europa,
Galaxy,
Ganymede,
Mars,
Mean time,
Mercury,
Moon,
Nebulus,
Oort cloud,
Orbit,
Orion,
Phase,
Planet,
Pleiades,
Pluto,
Protostar,
Quasar,
Saturn,
SETI,
Sun,
Supernova,
Telescope,
Uranus
Posted in puzzles on Dec 01, 2021