Are the venera venus landers sill on venus today? And how are they doing. A manned landing on venus is possible or not,and a walk around the planet too? But there is an extreme climat. Denis.
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Are the venera venus landers sill on venus today? And how are they doing. A manned landing on venus is possible or not,and a walk around the planet too? But there is an extreme climat. Denis.
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There is probably something still there, but they are probably corroded into unrecognizable heaps. Venus' atmosphere is highly corrosive.Originally Posted by Denis12
Ibid.And how are they doing.
Possible, but not probable. It is not the landing that is so difficult. It is the surving while you are there, and getting back to Earth that are the hard part. I think these topics were more fully discussed in your previous thread.A manned landing on venus is possible or not,
You could walk if you could breathe. The pressure at the surface is about 90 times the typical surface pressure here on earth. You would need a very specialized suit to counteract that. It would be much like the problems encountered by deep sea divers here on earth. In addition to the pressure, you would need a suit that is extraordinarily resistant to corrosion. Any little leak could mean certain death.and a walk around the planet too? But there is an extreme climat. Denis.
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nitpick mode
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If there will be a manned landing on venus in the future ,why is it a hard part to get back to earth? Before the venera project ,the russians have said that the veneras needed spotlights,because the darkness of the thickness of the always cloudy sky,but the spotlights are not really needed,because the venera landers show us the same darknees of a full cloudy sky in the winter on earth. And is the sun there (never) visible for a very short time? Denis
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Because you have to come up from the bottom of an incredibly thick atmosphere and fight air resistance all the way. It would be like trying to go into Earth orbit from the bottom of a sea 1 km deep. Direct rocket ascent is out of question; the only conceivable way would be lifting a rocket on a hydrogen-filled balloon to a height where air resistance is manageable, and launch from there. And since Venus' gravity is about 0.9 Earth's, launching from "there" is little different than launching from Earth surface. Think of rockets that carry manned capsules into Earth orbit. Now think what kind of balloon would it take to lift one of those...
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Already asked and answered in a similar thread, started by you.
1. Mass/gravity of Venus is similar to that of Earth, so larger thrust will be required to achieve escape velocity, etc., etc.
2. Don't begrudge the Russians playing it safe. Their Venus orbiters couldn't really penetrate the cloud cover, so it was a reasonable expectation. NASA thought the lunar soil could be spongy and so prepared for it.
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Well, the atmosphere is very thick CO2... I'll bet a slow propeller could be very effective.
As for walking on Venus, you'd need something like a Newtsuit with a very efficient cooling system. Motion down on the surface would be like walking under water, but you'd have a lot less buoyancy, so step-motors for motion assistance might be a good idea... On the other hand, that might add to the heat problem.
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Actually, I'd be willing to bet that the Venera landers are in good shape; I read in one book on Venus that erosion there is probably only a little higher than it is on the Moon. It would also be too hot for sulfuric acid droplets at the surface, IIRC.
Sending a two-part umanned mission just to find out how materials corrode in the Venusian atmosphere should be on our to-do list by 2100.
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You'd need a rail-gun style launcher like used by the people of Mercury in Clarke's Rama series... however, I wonder if humans could survive the g's to get off of venus...
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In the grand scheme of things, I think a little excess warmth generated by a mechanized suit are going to be the least of your heat issues...
Really, though, can anyone give me a really good reason to want to walk on Venus? I go back to my volcano analogy. Would there be any rational reason for wanting to walk into a volcano's lava chamber just to say you did it?
Lets be real. The Moon's a challenge, but its close, and the environment is passively hostile. Mars is a distance challenge, but its a close enough, environmentally, to Earth that we're not dealing with anything we can't cope with technically. Heck, if you want to draw an interesting comparison, look at what it takes to put people deep enough under the ocean at a depth where the pressure is equivalent to Venus's atmosphere.
We don't let divers get anywhere near underwater volcano's on Earth to where conditions would be fairly similar in mechanical aspects to walking around on Venus. Why would we send someone 20 million miles offworld and into an environment we won't let them go to only 10,000 feet underwater on this one?
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Think what the networks would pay for that. Especially if it is a well-known volcano, like Vesuvius.
And I am not joking.
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It is not a matter of "we don't let" -- if anyone were crazy enough to do it, there is no real way to stop him. So far no one has been both crazy enough and rich enough to put together an expedition to a deep undersea volcano. And I personally met someone who scuba dived off Kamchatka in the immediate vicinity of a shallow underwater eruption -- lava was pouring out of a crack 100-200 feet below surface. He approached closely enough to photograph the lava glow through water full of bubbles. A freak current could have easily killed him by tossing him a little too close into boiling water. But equipment he used -- dry suit with full-face mask, -- costs pennies compared to what you need to survive 1 km down even without a volcano.
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Heck, we don't even let Alvin linger long near hydrothermal vents. Some of those things can melt the instruments and damage the submersible!
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I suppose there would be some scientific value to it, but I doubt that would be worth the risks, and a robot can do most, if not all of what a human can do. Perhaps some time in the distant future, we might have the technology to terraform a planet. If that were the case, there would be definite value for missions to Venus. I doubt we would send men there short of something as far-fetched as that.
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I believe you, give an idiot enough rope...
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Why are the clouds on venus looking yellow and not white?
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Because they are composed of sulfur dioxide, not water vapor.
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