The Sun & Stars
rotation or revolution
Hint: "That's one small step for man - one giant leap for mankind"
(sunrise/sunset)
Sun is high in the sky = short shadow (solar noon)
March 21 - spring/vernal equinox
September 21 - fall/autumn equinox
Hint - it is the largest planet in our solar system
Hint - remember the jingle??
eg. Pioneer, Voyager