Why do solar eclipses happen only at the new moon?
a. A solar eclipse can occur only when the Sun is between the Earth and the Moon.
b. Solar eclipses can and do occur during other phases of the lunar cycle.
c. Since the shadow of the Moon extends directly away from the Sun, a solar eclipse can occur only when the Moon is between the Earth and the Sun.
d. Since the shadow of the Earth extends directly away from the Sun, a solar eclipse can occur only when the Earth is between the Moon and the Sun.