News for hackers. Stuff that matters.
Re:A young Venus had water for 2B years, habitable for longe... by detritus on Saturday May 02, 2020 @12:40PM (#23052910)
Oh my gosh - I'd never considered living inside a Venutian blimp before. Of course! Why not?

I still have fantasies about Venus being somehow a more likely [very] long-term prospect for terraforming, despite the planet's rotational problems. Seems like a thick atmosphere filled with (admittedly lethal) useful gases and potentially-organic compounds offers a much better resource than Mars' practical lack of a one.

Re:A young Venus had water for 2B years, habitable for longe... by _Microft on Saturday May 02, 2020 @03:21PM (#23054199)
Re:A young Venus had water for 2B years, habitable for longe... by bilbo0s on Saturday May 02, 2020 @01:34PM (#23053411)
>I'd never considered living inside a Venutian blimp before. Of course! Why not?

Are you aware of wind velocities at an altitude high enough to get you 1 bar on Venus?

Think Goodyear blimp --

in hurricane Katrina.

OK, now that you've got a picture of that in mind --

double the wind speed.

Re:A young Venus had water for 2B years, habitable for longe... by detritus on Saturday May 02, 2020 @05:20PM (#23055015)
Vega 2 Dropped a balloon probe over 40 years ago that lasted at least a few hours as it floated at its level and traversed 11,000Km. Why not hope that in another couple of hundred years we could make something that could last significantly longer, and could house a manned station? Before then, small steps?

Venus is a hellscape by comparison to Earth, but we are incredibly resourceful apes with imaginations unbound by meagre constraints.

Re:A young Venus had water for 2B years, habitable for longe... by omgwtfbyobbq on Saturday May 02, 2020 @01:43PM (#23053486)
Isn't the dv/dt really the issue? If Venus has stable high altitude wind, would the speed really matter?
Re:A young Venus had water for 2B years, habitable for longe... by klyrs on Saturday May 02, 2020 @02:38PM (#23053898)
Call me pessimistic but I'd expect some pretty wicked turbulence... what'll happen to that blimp when each side is taking on cat5 velocities in different directions? "Artificial gravity" is not the right answer ;)
Re:A young Venus had water for 2B years, habitable for longe... by omgwtfbyobbq on Friday May 08, 2020 @07:53PM (#23120807)
That doesn't seem to be the case for the most part, although I'm sure something would need to consistently monitor weather conditions to avoid anything close to that.

This altitude is within the high-velocity "superrotation" region of the Venus atmosphere, where a constant wind moves at a velocity on the order of a hundred meters per second. This means that over the two days of the mission, the balloons traversed about 11,000 km, from the night hemisphere into the day hemisphere. About two days into the mission, the primary batteries were depleted, and contact was lost.

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/201100...

Edit - According to this the zonal winds are ~60mph at certain elevations.

https://trs.jpl.nasa.gov/bitstream/handle/2014/44535/13-5079...

Re:A young Venus had water for 2B years, habitable for longe... by yongjik on Saturday May 02, 2020 @02:45PM (#23053940)
Oh, and the air has enough sulfur dioxide to kill you, because otherwise it would be too easy.
Re:A young Venus had water for 2B years, habitable for longe... by pacala on Saturday May 02, 2020 @01:31PM (#23053395)
Why not? Because of the myriad things that can go wrong and bring doom to the enterprise. In due time one of them will happen. Stable systems are governed by negative feedback loops, blimps are not one of them.
Re:A young Venus had water for 2B years, habitable for longe... by Sharlin on Saturday May 02, 2020 @01:57PM (#23053585)
Neither are ships, but we have become pretty good at keeping them buoyant, primarily by properly compartmentalizing the internal space.