Life Cycle of Stars.

Hello guys!
It's Abhishek!
I'm back with my information over "Blackholes"

Nebula

OK, first..
I'll go with the life cycle of a star..


1)Nebula : A star forms from a nebula.
A nebula is like a cloud of gases ( Mostly hydrogen ) and dust particles..

Nebula

2)Star : From a nebula, a star is born..
An average  star lives for about 7 Lakh to 8 Lakh years. Some stars tend to live a little over a million years.
The life force of a star (or) the fuel of a star is provided by nuclear fusion.

Sirius Dog Star.

3)Red Giant : After a few lakh years of turning into a star, it transforms into a Red Giant.
The size of a red giant can be about 100 times the size of a star.Sometimes, the size ranges to about 50,000 times the size of a star..
Red Giant's are very bright.About thousand to million times brighter than the star itself.

Red Giant

Red Giant

4) Red Dwarf : After a few million years, they turn into Red Dwarfs.. The huge Red Giant's shrink/contract into about 10 times smaller than our average sun..

5)White Dwarf : A white dwarf is hot but extremely small... A white dwarf is extremely dense.. The size of a white dwarf may be about the size of our earth but with a mass equal to that of the sun.

Red Dwarf,Star,Red Giant,Blue-white supergiant.

6)Supernova : Ah! The Supernova.. It's the explosion caused by the death of the stars.. Supernova's are extremely bright and extremely hot... A supernova will destroy a neighbouring solar system..

The remains of a supernova are either a blackhole or a neutron star.

Supernova

7)Neutron Star : Neutron stars are extremely extremely dense. They have the mass which is about 3 times the mass of our sun but with a diameter of about 20 kilometers.Neutron stars are formed after a supernova.
If the mass is greater than the required mass, the gravitational pull of the star will be extremely strong which will lead to a black hole.

Neutron Star

Neutron Star

8)Black hole : A black hole is formed after a massive star is dead.Black holes have insane gravitational pull.It's so high that not even light can escape them. Blackholes disturb the time-space around it and they're strong even to swallow massive stars.

Blackhole

Blackhole

What are black holes???

Hello every one.This is Bharath kumar and this is my first post in the blog.
           Today,Lets know something about black hole.

Q: What is a black hole?? Ans:: Black hole is a dark blackish matter present in the space.It is considered as Vacuum cleaner of the universe because it swallows all the matter near to it by it's high gravitational pull.It's gravity is so high that even a light ray cannot escape from it.The very first experiment about black holes was done by Stephen Hawking.

Black hole

Q: How is this block hole formed in the space??Ans: Black hole takes it's origin after the death of a Star.(i.e When star stops burning).It is said that even our star will become a black hole(But it takes nearly 6 billion years to Become a black hole)

Q:What are the stages of a star to convert into a Black hole??

Ans: The very first stage of a star to it's way to black hole  is Red giant stage.The nuclear fuel in the Star gets sinked.The star forms into a huge red mass called as Red giant.

Red giant

White dwarf

When a star completely spends it's nuclear fuel it converts it white dwarf stage.During this stage the star looks in bright white colour.It's mass will be half of the mass of the star.The nearest white dwarf to the earth is Sirius B.In this stage the star starts cooling down.

                        

Neutron Star

After this white dwarf stage,the star completely degrades and it may form as Neutron star or diectly as Black hole.Sometimes Even supernova occurs and the star explodes and form neutron star or a black hole

Stay Tuned for more updates About the Black holes.And if you have any doubt,Feel free to comment...

                                                                                              -Bharath Kumar