Answer:

total solar eclipse—like the one that crossed the U.S. in August, 2017—occurs when the disk of the Moon blocks 100 percent of the solar disk so that sunlight does not reach Earth. ... A partial eclipse occurs when the Moon only partially covers the disk of the Sun. The Earth, Moon, and Sun are not perfectly aligned.

lunar eclipse can occur only at full moon. A total lunar eclipse can happen only when the sun, Earth and moon are perfectly lined up — anything less than perfection creates a partial lunar eclipse or no eclipse at all.

1. As illustrated in the figure, in a total eclipse the surface of the sun is completely blocked by the moon, in a partial eclipse it is only partially blocked, and in an annular eclipse the eclipse is partial, but such that the apparent diameter of the moon can be seen completely against the (larger) apparent diameter of ...

2.A lunar eclipse occurs when the Moon moves into the Earth's shadow.[1] This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned (in syzygy) with Earth between the other two, and only on the night of a full moon. The type and length of a lunar eclipse depend on the Moon's proximity to either node of its orbit

A totally eclipsed Moon is sometimes called a blood moon for its reddish color, which is caused by Earth completely blocking direct sunlight from reaching the Moon. The only light reflected from the lunar surface has been refracted by Earth's atmosphere. This light appears reddish for the same reason that a sunset or sunrise does: the Rayleigh scattering of bluer light.

Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. A total lunar eclipse can last up to nearly 2 hours, while a total solar eclipse lasts only up to a few minutes at any given place, because the Moon's shadow is smaller. Also unlike solar eclipses, lunar eclipses are safe to view without any eye protection or special precautions, as they are dimmer than the full Moon.