Question

When does a lunar eclipse occur?
A. When Earth comes between Sun and moon
B. When Sun comes between Earth and moon
C. When Moon comes between Sun and Earth
D. When Earth comes between Star and moon

Answer 1

Hint:The Moon is the only natural satellite of the Earth. It is the largest natural satellite in the Solar System compared to the size of the planet, the fifth largest satellite in the Solar System overall, and bigger than any dwarf planet, with a diameter of around one-quarter that of Earth.

Complete answer:
If the Moon passes into the shadow of the Earth, a lunar eclipse occurs. This will only happen on the night of a full moon when the Sun, Earth, and Moon are precisely or very nearly aligned, with Earth behind the other two. The type and duration of a lunar eclipse are determined by the Moon's approach to one of its orbital nodes.

Owing to the reddish hue created by Earth entirely blocking direct sunlight from hitting the Moon, a fully eclipsed Moon is often referred to as a blood moon. Earth's atmosphere has refracted the only light emitted from the lunar horizon.

The Rayleigh scattering of blue light causes this light to look reddish, just as it does at sunset or sunrise. When the Moon passes between the Earth or when the Earth is between the Sun and the Moon, a lunar eclipse occurs. The Earth obstructs the Sun's rays from reaching the Moon.

Hence option A is correct.

Note:A lunar eclipse can be seen from anywhere on Earth's night side, unlike a solar eclipse, which can only be seen from a small region of the globe. Owing to the smaller scale of the Moon's shadow, a complete lunar eclipse can last up to nearly 2 hours, whereas a total solar eclipse can only last a few minutes at any given location. Lunar eclipses, unlike solar eclipses, can be seen without eye safety or extra measures since they are fainter than the full Moon.