How do we know they are far away
Type 1a supernovae they are the standard candle. (I’m not altogether ignorant of these things. My original comments were boldly stolen from astronomers and astrophysicists. They know the limitations of the current knowledge and the lack thereof. )
I love these posers trying to seem erudite who smugly make comments like “I guess you’ve never heard of the Drake Equations, huh?”