HR Diagram
This color stars are big, hot, and bright - up to 200 solar masses.
This element has only one proton.
Hydrogen
Stars live for millions or even these many years.
Billions
The qualifying size of even the smallest stars are about 13 times the mass of this planet.
Jupiter
When a star has no more helium left to burn, it will do this.
Collapse
Yellow stars are the in between sized stars, close to this many solar masses.
One
Multiple nuclei combine through this process.
Fusion
A star with more fuel gets it from this.
Mass
Any star begins from a large grouping of gas and dust, called this.
Cloud
The ejected shell around this is called a planetary nebula.
White Dwarf
Red Stars are this size, cool, and dim - down to 0.1 solar masses.
Small
Lead decaying into Iron would be an example of this process.
Fission
Deuteron
When gravity and fusion cause a yellow or red star, it is categorized here on the HR diagram.
Main Sequence
Big stars go out with a this.
Bang
A Red this is red and cool, 0.3 - 8 solar masses.
Giant
If Oxygen were to lose an alpha particle, it would become this element.
Carbon
Fusion of a star will continue as long as this element continues to fuel it.
Hydrogen
When hydrogen fuel runs out and the core shrinks, the extra energy being produced causes this kind of Giant.
A star living for only tens of millions of years must have such a short life time because it is this.
Big
A white dwarf is tiny and this temperature, 0.2 to 1.3 solar masses.
This heavy element of 26 protons is the reason stars get so massive that gravity overpowers nuclear energy.
Iron
When heavy nuclei combine, elements like Carbon and Oxygen form during this process.
Triple Alpha
This is when a star is hot enough to fuse heavier helium nuclei.
Helium Flash
This is the heaviest element that can be fused in a star.
Iron