Question

What part of the sun is visible during an eclipse?

Answer 1

Hint:An eclipse can be defined as the astronomical event which occurs when an astrological object or the spacecraft is temporarily hidden by passing into the shadow of another body or by having another body pass between it and the viewer.

Complete answer:
In simple words, an eclipse is the total or the partial hidden of one celestial body by another.The visibility of the part of the Sun depends on the type of solar eclipse.There are four types of the solar eclipse.
-A partial eclipse – It is observed when the Sun and the Moon are not completely aligned and the Moon does not cover completely the Sun’s disc. The Sun can be observed safely through filters.
-A total eclipse - It is observed when the Sun and the Moon are not completely aligned and the Moon is larger than the Sun and therefore it covers completely the Sun’s disc. During the total eclipse, the Sun’s corona is visible.
-An annular eclipse – It is observed when the Moon is too distant to cover the Sun’s disc completely. It is observed through chromosphere and prominences.
-A Hybrid eclipse – It is observed when the Moon’s disc is of the same size as the Sun’s disc. It is also observed through chromosphere and prominences.

Hence, during the normal time the outermost layer Corona is not visible and it can be only visible when the Moon hides the Sun.

Note:The alignment of three celestial objects such as the Earth, the Moon and the Sun is known as syzygy. Also, know the difference between the solar and the lunar eclipse.