The signs listed here are fun to learn and fun to sign because there's movement involved — a shooting star, an eclipse of the moon, and a twinkling, star-filled sky are only a few examples.
STAR:

SHOOTING STAR:

FULL MOON:

CRESCENT MOON:

SKY:

STAR-FILLED SKY:

ECLIPSE:

HEAVENS:

SUN:

English: Did you see the shooting star?
Sign: FINISH — SHOOTING STAR — SEE— Q
English: The eclipse was red.
Sign: ECLIPSE — RED — TRUE (affirmation)