>>6406382
lost it at doreen
>>6406382
10/10
-523
>>6406842
Closest thing I have
>>6404603
>>6404603
Physics, close enough i guess?
btw OP that is a clean as fuck wall
Very chemistry, if you know chemistry
>>6413851
>>6412072
I know chemistry but not very chemistry.
explain please?
>>6413866
Can't remember what it's called but I think it's that thing where the check the light output of a star and check what's missing to see what elements are present in the star
>>6413920
spectroscopy?