[last_one_in]

No way! I got the weight of a caffeine molecule right! I am so proud of myself right now. Thanks! I've got water as 3e-26 but that doesn't seem right. Water molecule x10 lighter than caffeine molecule?

"The fuel weighed almost 20 times more than the Shuttle" - makes me want to go play KSP.

Yep, I think I've got the fully loaded shuttle + external tank + boosters weight.

Thanks a lot!