How The Heck Does Gravity Make Stars?!

Описание: Episode 1 of 3

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Stars come from a very precise situation in the universe. What exactly happens though?

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Previous Series:

PLASTIC YT PLAYLIST:
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What is a star?:
http://coolcosmos.ipac.caltech.edu/as...

"A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements."

WHAT IS A STAR?
http://www.universetoday.com/24351/wh...

"Look up in the night sky and you'll see lots of stars. But what is a star? In a scientific sense, a star is ball of hydrogen and helium with enough mass that it can sustain nuclear fusion at its core."

HOW DOES A STAR FORM?;
http://www.universetoday.com/24190/ho...

"We owe our entire existence to the Sun. Well, it and the other stars that came before. As they died, they donated the heavier elements we need for life. But how did they form?"

Star Formation:
http://abyss.uoregon.edu/~js/ast122/l...

"Stars form inside relatively dense concentrations of interstellar gas and dust known as molecular clouds. These regions are extremely cold (temperature about 10 to 20K, just above absolute zero)."

WHERE DO STARS FORM?:
http://lasp.colorado.edu/education/ou...

"Stars form in the densest regions of the interstellar medium, or ISM, called molecular clouds. The ISM is the name given to the gas and dust that exists between the stars within a galaxy. It is 99% gas and 1% dust, by mass."

WHAT ARE THE DIFFERENT TYPES OF STARS?
http://www.universetoday.com/24299/ty...

"A star is a star, right? Sure there are some difference in terms of color when you look up at the night sky. But they are all basically the same, big balls of gas burning up to billions of light years away, right?"

STAR TYPES:
http://www.enchantedlearning.com/subj...

"Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M."

SINGLY IONIZED HELIUM ATOM:
http://guide.ceit.metu.edu.tr/thinkqu...

"Singly ionized helium is an atom that has lost one of its electrons. We must expect its remaining electron to act like a hydrogen electron. There is only one difference between a hydrogen atom and a singly ionized helium atom; number of protons in the nucleus, so the nuclear charge. Thereby we have to modify our equation that we found for hydrogen atom."

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