What is a blood moon see the red dot
Answers
Lunar eclipses occur in pairs with solar eclipses, two weeks apart. This is because the Earth, sun and moon must be aligned for an eclipse to occur, and the alignment can only happen twice during the moon's month-long orbit.
A lunar eclipse lasts for hours as the moon slowly orbits through the Earth's shadow.
If the moon passes through the edge of Earth's shadow, it's called a partial eclipse. Passage through the dense center of the shadow is a total lunar eclipse.
As we know that Moon orbits around the Earth and Earth orbits around the Sun. Moon takes around 27 days to orbit the Earth. The relative positions of the Sun, the Moon and the Earth change during the Moon's orbit.
During total lunar eclipse, Moon remains fully in Earth's shadow. And at the same time small amount of light from Earth's falls on the surface of the Moon during sunrise and sunset. Since, the light waves are stretched out, they look red and when this red light strikes the surface of the Moon, it also appears red.
Or we can say that when Earth comes in between the Sun and the Moon, Moon will not receive direct sunlight from the Sun. The light which is seen is refracted through Earth’s atmosphere, giving it a red tinge. It depends upon the pollution, cloud cover in the atmosphere that how much red the Moon appears. And this colourful effect sometimes calls a lunar eclipse a Blood Moon.
Do you know that roughly two or four lunar eclipses occur every year according to NASA and each one is visible over about half the Earth?
From this article we understood that a blue moon is the second full moon in a single calendar month, a supermoon is a moon that is full when it is at its closest point in its slightly elliptical orbit around the Earth and a total lunar eclipse or blood moon in which Earth's shadow upon the lunar eclipse gives it a reddish colour.
