| range(noun, movement, track, path, orbit) |
| ray(noun, light, brightness, gleam, illumination) |
| revolution(noun, movement, track, path, orbit) |
| rotation(noun, movement, track, path, orbit) |
| rotational speed(noun, nature, science, physics) |
| round(noun, movement, track, path, orbit) |
| selenology(noun, nature, science, space, solar system) |
| shading(noun, shade, obscure, dim, veil) |
| shroud(noun, shade, obscure, dim, veil) |
| sky-watching(noun, nature, science, space, solar system) |
| solar(adjective, space, cosmos, galaxy, solar system) |
| space science(noun, nature, science, space, solar system) |
| spring tide(noun, nature, force, gravity) |
| stargazing(noun, nature, science, space, solar system) |
| starwatching(noun, nature, science, space, solar system) |
| tidal effect(noun, nature, force, gravity) |
| tides(noun, nature, force, gravity) |
| track(noun, movement, path, orbit) |
| trajectory(noun, movement, track, path, orbit) |
| uranology(noun, nature, science, space, solar system) |