Question

When the moon is lying on a line directly between the Earth and the sun, close enough to cast a full shadow on the Earth, we have a

Answer 1

A lunar eclipse can occur when the Sun, Earth, and Moon are aligned, with the Moon in full phase. As the Moon moves into Earth's shadow, it gradually darkens, and the curved shape of Earth's shadow becomes visible.

Step-by-step explanation:

A lunar eclipse can take place only when the Sun, Earth, and Moon are in a line. The Moon is opposite the Sun, which means the Moon will be in full phase before the eclipse, making the darkening even more dramatic.

About 20 minutes before the Moon reaches the dark shadow, it dims somewhat as Earth partly blocks the sunlight. As the Moon begins to dip into the shadow, the curved shape of Earth's shadow upon it soon becomes apparent.