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May 7th, 2015, 02:55 AM
#121
What fresh hell is this?
The fact that a latex balloon can get to 36km means that before it pops, the gas inside the balloon is enough less dense than the air around it to hold up the weight of the balloon and its payload. There's some air there. It's not much but it's enough. I realize that it's arbitrary. There's no exact spot where the atmosphere properly ends, but the Kármán line is generally accepted as reasonable by aeronautics and space organizations.
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May 7th, 2015, 05:32 AM
#122
I would say that almost by definition "space" is above where a balloon can go.
Buoyancy and space don't go together.
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May 7th, 2015, 06:36 AM
#123
That's true enough when you look at it that way. Interestingly the US recognises anyone who goes above 50 miles as an astronaut and oddly enough the Space Treaty that protects space equipment from being shot down by rival powers doesn't actually specify an altitude but yes, 100km is the more commonly recognised divide, but some satellites get closer than that during their orbit.
Last edited by LHutton; June 16th, 2015 at 09:02 AM.
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May 10th, 2015, 03:30 PM
#124
Senior Member
New Horizons is closing in on Pluto. Very exciting. Last month it sent back a picture of Pluto and Charon. Previous to that I think the best pic they ever had was one that was heavily pixelated. The next couple of months will be very exciting.
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May 14th, 2015, 08:53 AM
#125
What fresh hell is this?
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June 14th, 2015, 09:26 AM
#126
mAdminstrator
Philae woke up.
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June 14th, 2015, 05:59 PM
#127
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June 24th, 2015, 05:50 AM
#128
Senior Member
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June 26th, 2015, 10:30 AM
#129
What fresh hell is this?
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June 28th, 2015, 06:33 AM
#130
Where are my keys?
My son, Connor, coming in from outside: "Dad, I think I saw the rocket come back down."
Uh oh.
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