As an aspiring astrophysicist, I know a thing or two about space. I also know that space is super cool and almost everyone I've ever talked to wants to learn more about it. This is a technique of studying I do with friends and family, as by teaching something that I know, if better cements that concept into my brain.
Fair warning: I don't know everything, and I will let you know if what you're asking is out of my grasp. But I'm pretty good, so fire away.
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Not sure if this is more astronomy or engineering, bit of both i guess, so it might be a bit unfair, but: How realistic is Elon Musks goal to have a colony of 80,000 people on mars by 2050? Also, how many methods of detecting non-intelligent life are there? I know there are a fair few for intelligent life, such as looking for waves and signals, ect. But I imagine it must be infinitely more difficult to look for, say, bacteria. Not a quiz, just curious, but I hope it helps in some way.