Dorfman writes:
Even today, scientists admit that they do not know how many stars there are. Only about 3,000 can be seen with the naked eye.
Depends upon where you are. Please double that number at least for skies in the desert southwest of the US away from city light.
All stars look alike to the naked eye.
and
We understand that people can perceive some slight difference in color and apparent brightness when looking at stars with the naked eye, but we would not expect a person living in the first century A.D. to claim they differ from one another.
I can't vouch for other people's eyes but to me Betelgeuse is clearly red, Rigel is clearly white, and Altair is clearly yellow as has been noted since ancient times. If you don't believe me, go look for yourself.
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