The Sun, so far the brightest object in the Solar System, is actually a star. The Sun's Surface temperature is 5778 K hot! The core can get up to more than 27 million degrees Fahrenheit! The Sun s not the biggest star though, there is actually bigger types of stars millions of times bigger than the Sun! The Sun's average radius is 695,508 km! It gives light to the whole solar system, including us.
All stars live. They are made in a way that is so interesting. Stars actually are born, and they run out of fuel and die. Stars are made in 3 different ones. A small star, medium star, or a massive star. There are 6 steps to this process. thousands can even be born at only one time! Here is all about star birth.
Star Birth: Step 1
There are big clouds of gas called nebulas. One big and well-known nebula is the Orion Nebula.
Star Birth: Step 2
The Big Clouds Shrink under their own gravity soon.
Star Birth: Step 3
The clouds break into clumps when this happens.
Star Birth: Step 4
The clumps get really hot. They also get really dense.
Star Birth: Step 5
When the heat and density is there, nuclear reactions begin.
Star Birth: Step 6
When the temperature reaches 10 million degrees Celsius, every clump becomes a new star. The leftover wreckage from the gas cloud sometimes is used to make new planets!
All stars eventually die, when they run out of fuel. every star has a stage when it shines bright, it is called a stable star. Massive stars can turn into black holes when they die, and they can create supernovas that are brighter than a billion suns. Medium stars expand into red giants in this process. They can become so big nearby planets will be swallowed up by their force. Small stars expand too, and create a dead black dwarf star, which was once the shining core. and we thought they were only bright lights, shining in the night, when the secret behind them is so much more interesting. Let's learn about star death.
Small Stars = Less Than Half The Mass Of The Sun
It takes about a trillion years, but small stars use up all their hydrogen. They begin to shrink, and their light fuels out and they dim. Then they become tiny and so dim, It's light and fuel have been used up, and they become a dead black dwarf, about the size of earth.
Medium Stars = About The Size Of The Sun
Nuclear Fashion spreads out across the star, and it expands. It expands into a Red Giant. Nearby planets may be swallowed up by it. It all turns, like a nuclear reaction, into a planetary nebula. It is a big cloud of wreckage. Then it becomes a white dwarf, which is the core. Eventually, the white dwarf will turn into a black dwarf.
Massive Stars = Over 8 Times The Mass Of The Sun
Now This is the interesting one. Massive stars expand and expand, into a supergiant. Supergiants are the biggest stars, they can be a billion times the volume of our sun! Then... the whole star collapses into a big explosion which causes a supernova, that can be brighter than a billion suns! Then, the core collapses until it's core becomes billions of times smaller than an atom. If the core is smaller, it becomes a neutron star, which is a star up to 3 times bigger than the sun and is fast spinning. But If the core is bigger, It becomes a black hole...