TLDM? Too Long, Didn't Math?

Thank you.

Don't be afraid to look at spotting scopes too. Love my 100mm Celestron.

https://www.bhphotovideo.com/c/browse/Telescopes-Astronomy/ci/3389

I was responding to the "taking water from Earth" part of the previous comment. The exhaust from a rocket launch to orbit stays in the atmosphere.

(I've done space systems engineering for 45 years now, so I do understand how rockets work).

Who let the skinnies in?

This is what I was trying to find out. Snoopy went down to about 10 miles above the surface. Haven't been able to find out what altitude Charlie Brown's orbit was, but you'd guess it was far enough apart to test the rendezvous radar and other systems.

Thanks. I’ll look into it.

Industries of Titan? I'm down. When do we leave?

The exhaust from a rocket is basically unusable as a source of water for astronauts. Every drop of water you take from the exhaust, too, would be reducing the rocket's efficiency. In order for that rocket to work, you need all those combustion products to fly out the back of the nozzle at high speed. Anything you put in the exhaust stream that is attached to the ship is going to reduce the effective thrust of the rocket (assuming it doesn't just melt first). You'd be better off just already having a water storage tank on the spacecraft, but then we get back to the original problem.

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Because anything you do in space needs to account for the fact that you're floating in a void with essentially nothing around you but radiation. The materials have to come from somewhere, and you need to consider orbital mechanics to get from one body to another in space.

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There's no water you can't purify. The question is, how much energy is it going to take to do that?

Wow, that was kinda extreme.

If I had a button that I could push to end the existence of our species , me included, I would do it. Difference between me and the other members of the species, however , is that I am aware of how terrible we are and that we should be extinct. That was all I was saying

Last night was the closest/brightest it will get.

I mean, you are electromagnetically polluting the environment each time you use any gadget and you have probably disposed of waste a lot of times over so I'd not say you are off the coast regardless of whether you are brutal because you certainly still are. Everyone is. This species sucks and it's bad for its own planet.

"Hydrocarbons" encompasses a huge number of compounds that includes crude oil.

Largely irrelevant. Any small body we decide to visit out past Mars has huge deposits of either hydrated minerals, ice, or has other compounds that can be broken down into hydrogen and oxygen.

Fuel cells generate electricity. They're not used for propulsion.

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Not at all. I have empathy for the other creatures of this planet it is why I became a vegan , it is why I wont even kill an ant , or a spider. A species that inflicts pain , torture , suffering upon the other creatures of the planet deserves extinction

I'm not sure Callisto belongs on that list. It's largely undifferentiated and not likely to have large pockets of water, let alone an entire ocean. But it's been a while since I've read anything new about it that assessment could have changed.

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The radiation is coming from above (i.e from the direction of Saturn...and also from the rest of space...not from material on Mimas). Put a meter or two of ice betwen you and that and you're good.