Question

Which of the following determine the phase of the moon?
A. Position of the moon
B. Position of the sun
C. position of the earth
D. all of the above

Answer 1

D? or A

Answer 2

all 3 of those objects are involved

Answer 3

wait no, it's D.

Answer 4

....

Answer 5

Its all of the above

Answer 6

Well what are the phases of the moon? It is just how much light is making its way from the sun to its surface. The dark spots exist when the sun is being blocked by the earth. So seeing that this is the case.... I think you already see its D :)

Answer 7

a light source at the sun, the shadow on the moon depends on the positions of all 3 in 3-space