Geography/Solar system

In a solar eclipse, 

the Moon passes between Earth and the Sun and stops some or all of the Sun’s light from reaching Earth. There are three kinds of solar eclipses

1. Partial solar eclipse
2. Total solar eclipse
3. Annular solar eclipse

In an annular solar eclipse or ring of fire, the Moon does not completely cover the Sun but leaves the edge of the Sun showing.

The umbra is the dark center portion of a shadow. The Moon's umbra causes total solar eclipses, and the Earth's umbra is involved in total and partial lunar eclipses.

Eclipse  shadow

• The umbra is a shadow's dark core.
•  Antumbra -The lighter part of the shadow that begins where the umbra ends.                                           It only exists if the light source has a larger diameter than the object.                                             Experience in annular solar eclipse

• Penumbra - the lighter outer part of the shadow.Partial Eclipse

Total, partial, and annular solar eclipse.

1.       The Moon's umbra, the shadow's dark central portion, causes total solar eclipses, where the Moon appears a little larger than the Sun and covers it completely.

2.       The penumbra, the lighter outer part of the shadow, creates partial solar eclipses. Here, the Moon obscures only a part of the Sun's disk.

3.       The antumbra, a half-shadow that begins where the umbra ends, results in annular solar eclipses. During this type of eclipse, the Moon looks a little smaller than the Sun, so the edge of the Sun's disk remains visible around the Moon.

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There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M. O and B stars are uncommon but very bright; M stars are common but dim

Sun is G type star

Sun is also called yellow star

Sun's Differential rotation

White dwarf.

 Sirius A and B are white dwarf.

biggest star in galaxy:

Stricture of sun:

Photo-sphere

Chromo-sphere

A thin region of sun which is 3,000,000 km thick is called  chromospheres

Corona:

Outer atmosphere of  sun is called corona.

central part of sun is regarded as core.