When Earth passes directly between the sun and the moon, a lunar eclipse takes place. During a solar eclipse, the moon casts two shadows. One is called the umbra; the other is called the penumbra. An eclipse takes place when Earth or the moon passes through a shadow.
Answer: When the Moon passes between the Sun and Earth, it creates a lunar shadow that can be seen on Earth, which is a solar eclipse. When the Earth passes by the Moon and Sun, the shadow makes a lunar eclipse.
