Star classification

So yesterday, we went a bit into star classification but there is more to it.

So the smallest star is a red colour and goes as low as 2,500 kelvin and is M class. Next is K and it is a orange colour star and goes up to 5,200 kelvin, then G, which is what our sun is. G stars are yellow and temperatures can go as high as 6000 kelvin, then F stars which are a white-yellow colour and temperatures can be as hot as 7,500 kelvin, following that are the A class stars which are white in colour. They can be extremely hot at 10,000 kelvin. Second to last is B, they are white-blue and can reach 33,000 kelvin in temperatures. Finally is class O which is blue and can go over 60,000 kelvin.

So they're the main classes, but there are sub- classes as well. They contain numbers ranging from 0-9 and roman numerals from I to V. The numbers are in tenths to the next star class. The Roman Numerals measure the size of the star which shows how much light it gives out.