Here's why:

* The Moon's Position: During a New Moon, the Moon is positioned between the Earth and the Sun.

* No Blockage: However, the Moon is not directly in line with the Sun and Earth, so its shadow does not fall upon Earth.

* Visibility: As a result, the Moon is not visible from Earth at this time.

It's important to note that a New Moon is not actually completely invisible. If you know where to look, you might be able to spot the very thin sliver of the Moon just before sunrise or after sunset.