Group 4 Eclipses

An eclipse is an astronomical event that takes place when an astronimical object is temporarily obscured either by passing through another astronoimcal object`shadow or another boy passing between it and the viewer.
There are two types of eclipses, these are SOLAR and LUNAR eclipse

SOLAR ECLIPSE

A solar eclipse occurs when the Moon passes between the Sun and the Earth so that the Sun is wholly or partially obscured. This can only happen during a new moon, when the Sun and Moon are in conjunction as seen from the Earth.

LUNAR ECLIPSE

A lunar eclipse occurs when the Moon passes behind the Earth so that the Earth blocks the Sun's rays from striking the Moon. This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a full moon. The type and length of an eclipse depend upon the Moon's location relative to its orbital nodes. Unlike a solar eclipse, which can only be viewed from a certain relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of the Earth. A lunar eclipse lasts for a few hours, whereas a total solar eclipse lasts for only a few minutes at any given place, due to the smaller size of the moon's shadow. Also unlike solar eclipses, lunar eclipses are safe to view without any eye protection or special precautions, as they are no brighter (indeed dimmer) than the full moon itself.

WHY CANT YOU LOOK DIRECTLY AT A SOLAR ECLIPSE?

There are UV rays still glaring down from the visible prominences of the sun which can cause serious damage to the human eye. one of the ways to view this amazing cosmic event is get a certain camera filter with a certain filter.
The other reason being, when there is eclipse, there is darkness and hence the pupil in our eye expand to absorb more light in order to see better. But when the moon moves further there is a sudden burst of light coming in and our pupils are still expanded(it takes more time for it to settle down) by then the burst of light directly falling on the eyes would have caused a lot of harm.
Added to this, during eclipse, the curiosity makes us stare at the sun for longer then the usual glance that we do of a fraction of second. This adds to the side-effects caused to the eyes during a solar eclipse. LunarEclipse.jpg

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