Riddle

What can emit an umbra on the earth, provide phosphorescence for all it's creatures. All while altering the visual surface of itself within phases?

Choose an answer

A.A solar eclipse
B.A comet
C.A satellite
D.The moon.
Hint: It's a 2-word phrase with 7 letters, starting with "T".

Answer

The moon.

Why this is the answer

The moon casts a shadow (umbra) during eclipses, glows faintly (phosphorescence-like) at night, and its visible shape changes through lunar phases.

This riddle is filed under How, What, Why Riddles and rated Hard.