1 upvotes, 1 direct replies (showing 1)
View submission: Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
What is a candle in this context?
Comment by thunts7 at 20/07/2022 at 21:37 UTC
3 upvotes, 1 direct replies
A star or supernova of known brightness. Basically based on characteristics we can tell what type of thing it is and that this is always a certain brightness and then we can go well if it should be this bright at whatever distance then the fact that it's only this bright means it's this far away