There appear to be minor variations from chart to chart for OBAFGKM charts on the internet, where it concerns what color stars are. For example, some charts list Type A stars as white, some list them as blue-white. Some charts list type M stars as red, some list them as orange-red. I understand that there’s probably some room for interpretation, but can you tell me if there’s a definitive chart that you’ll be using to score the tests? Thank you!!
The minor variations will not make a difference. For example, I could imagine asking something like
– True or False – O stars are bluer than K stars.
– or, order the following four star types in order of decreasing temperature A, F, M, O
So no subtle gradations of color are required, just a broad brush view of the sequence and that the bluer colors mean higher temperatures.