You'd perhaps hear something like this Sun sound. Although 10.000 times harder. Just static, white noise. If life evolved under those circumstances, I doubt they'd evolve any hearing mechanism. It's just too loud.

Sounds like a great Rimworld mod!

Europas good if you have an insane drill and want to live underwater in the dark

Careful with ether, emergency use only. Czechoslovak army did testing on that back in the day with V3S truck and 1 start on ether created engine wear equivalent to 1000 km of driving.

I don't know for sure, but it would probably reflect it's vastness

>It's got a relatively high surface gravity.

Venus, Mars, Mercury, Io, our Moon, Ganymede, Titan and Europa all have higher.

>It is outside Jupiter's massive radiation belt

As are Venus, Mars, Mercury, our Moon

>There is water ice easily available on the surface

As there is at Mars and some would argue on certain parts of the Moon

>Close proximity to the asteroid belt

So is Mars.

>and the trojan asteroids around Jupiter,

They're actually a long way from Jupiter.

>The Jovian moon Callisto is the best body in the solar system to consider for future human colonization.

For what purpose?

There doesn't need to actually be a space race going forward, but rumors of one happening are productive towards keeping US congresspeople in line for guaranteeing budgets for manned spaceflight programs.

Been there once, it's probably fine for just looking at stars and stuff. But don't go there trying to see the northern lights, because there's no north-facing area.

There is an observation area on the shore of Lake Michigan where you can look out (as opposed to looking straight up with tall trees on either side of you), but that observation area faces the other side of a small bay. And that side of the bay isn't part of the dark sky park, so there are definitely lights along the shoreline.

Still, though, it's probably the best dark sky you'll find in or even around Michigan, except for the one in Pennsylvania.

I imaging listening directly to the sun would be the equivalent of looking directly at the sun, or touching the sun.

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Booo, you guys are no fun!

Very nice....who keeps saying we can't do DSO AP with a dob? ...this proves otherwise.

I'll have to try this out on my dob, but can only get about one quarter second subs since i only have the regular old school mount.

Ok. Here's the plan:

1. Spend centuries fully terraforming Callisto into a paradise with verdant Earthlike conditions on its surface.

2. Populate it exclusively with Amish settlers.

FANTASY, fantasize, fantasizing, fantastical, with a nice cold Fanta for when it gets hot outside.

In the bad old days (early 90s) I used a patched conic solver.

I wager that there are tools to do that kicking around.

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Paths with a gravity assist (handy!)

https://www.mathworks.com/matlabcentral/fileexchange/39462-gravity-assist-trajectory-design-and-analysis?s_tid=blogs_rc_5

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Someone's thesis (Matlab, again)

https://repositories.lib.utexas.edu/handle/2152/ETD-UT-2011-12-4849

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More Matlab (just adjust Mars till Saturn)

https://github.com/chicomcastro/optimized-Earth-Mars-transfer

etc.

And there are half a dozen antique TDs about FORTRAN codes kicking around on the NASA TRS.

> I like that you are taking it realistic though.

This is a sub for hard science after all, there's others better suited for creative writing ;)

> what would you think it would sound like if we could hear everything without consequences and death and not universal atmosphere, just like... our ears would be able to hear loud noises just fine and no destruction from sound... just imaginative... just a what if.

Ever been near a rocky seashore on a windy night?

Like that but louder than a jet engine 24/7 (mostly from the sun) with occasional gut-thumping cracks thrown in (from large celestial events) and maybe a couple discernible tones from millisecond pulsars depending on how loud of a sound your medium could carry before hitting vacuum at one extreme.

It would be pretty unpleasant

regular show intro but a little more ambient, or like 75hz frequency.

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Edit: or this https://youtu.be/Pmvfb8al0QE?t=18

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Damn man, it was just a what if situation with creative thoughts. I like that you are taking it realistic though. But what would you think it would sound like if we could hear everything without consequences and death and not universal atmosphere, just like... our ears would be able to hear loud noises just fine and no destruction from sound... just imaginative... just a what if.

Sound works by particles in close proximity repelling each other and thus passing pressure ripples along - so we either have sound everywhere and no chance of orbits or life, or vast swathes of emptiness with occasional islands where life could occur.

Fwiw it's thought that some of the variations in the CMB were from 'phonons' ie packets of sound energy in the plasma - see here

Also note that we have problems with the sound of rocket exhaust shredding concrete at launch pads (which is the main reason why we spray water under rockets when they lift off, it breaks up the shockwaves) - so astronomical events would trivially destroy everything over and over again if their sound could reach us.

Where'd you get 28km/s?

My handy dandy Delta-V map says LEO to Callisto's surface is only ~14.2km/s. I know Delta-V maps aren't super accurate but I find it hard to believe it's that wrong.

For reference, the map also puts LEO to Mars surface at 9.5km/s, which is within a reasonable margin of error of 10km/s.

I think it would sound like the intro audio to Alien

It would sound like a deafening mess and creatures would not develop the sense of hearing that much, because it would all be just white noise.

But what if the only effect that was help was sound? What if there was something that sound could travel through in space and it wouldn't have effected us and we could withstand the sound, in a way that we can hear all sound just fine! It comes to my thoughts that maybe space would sound cool! It already does!

Guess I missed that news, thanks. TBF there were other news coming out of China in 2020.