When the moon is in between the earth and the sun it is a

lunar eclipe is the answer

solar eclipse

Explanation:

When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can only happen when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon.

answerspecific gravity;