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93 votes
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Would it be easier to put humans on Venus rather than Mars?

Technically, yes, it would be easier to put people on Venus. You need less of a kick for the interplanetary trip and slowing down is trivial with that dense atmosphere...one of the Pioneer Multiprobe ...
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58 votes

Why was Venus rather than Mars targeted for the first interplanetary landings?

The reason is delta-v, which is a crucial concept in Spaceflight. It means change in velocity, and is the primary 'currency' that space mission have to expend in order to reach places in the solar ...
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55 votes
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Could the Saturn V actually have launched astronauts around Venus?

It takes surprisingly little delta-v to reach Venus for a flyby -- about 3850 m/s from LEO instead of the 3200 m/s or so required to get to the moon -- so while the payload would have to be reduced ...
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49 votes

Would it be easier to put humans on Venus rather than Mars?

As others have already pointed out, getting humans to Venus would be marginally easier than getting them to Mars. Let's consider survival on Venus in a little more detail though. Although there haven'...
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48 votes
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What are the teeth on the edge of Venera 13 and 14?

The teeth served an aerodynamic function. ...metal teeth were added to the periphery of the impact ring in an effort to reduce the spin and oscillation during the descent and prevent the rough ...
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47 votes
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When will we send floating probes to Venus?

When will we send? We already did. In 1985 and 1986 the Soviet Union sent two Vega probes to Venus. Both included a robotic balloon (usually called aerobots). The two balloon aerobots were ...
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39 votes

Could a fan be used to prevent overheating on a Venus bound space probe?

Fans work by moving cool air (or other fluid) over a warm surface. If there is no air, like in space, a fan will serve no purpose. Cooling things in space is actually a bit tricky because of this - ...
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37 votes

Why was Venus rather than Mars targeted for the first interplanetary landings?

We didn't know how hostile Venus's surface was, until we had landed there. The atmosphere of Venus makes it easier to land there than Mars. From Wikipedia, we learn: Before radio observations in ...
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35 votes
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Why is there currently so little talk about a Venus gravity assist for a crewed Mars mission?

The Venus flyby does indeed make the mission shorter, but it has some pretty serious negative consequences as well. The mission spends much more time in deep space. Approaching the sun will increase ...
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  • 118k
34 votes

When will we send floating probes to Venus?

Why are people so fascinated about Mars and not about Venus at all? The trivial answer - Mars is moderate place. A human could easily get around with a spacesuit, and it is trivial for robots and ...
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  • 1,594
34 votes
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What if a Space Shuttle entered the atmosphere of Venus?

Can't speak to the trajectory aspects but the Orbiter crew compartment was very intolerant of crush pressure loading. The two negative pressure relief valves protect the crew compartment from being ...
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30 votes
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What altitude would an aphrodiosynchronous satellite need?

Is such an orbit even possible? TL;DR: If the Sun wasn't around, yes, such an orbit is possible. But since the Sun is around, such an orbit is impossible. About the name of the orbit Quoting from ...
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27 votes

Is it more challenging to put an airship in the Uranian than in the Venusian atmosphere?

Buoyancy is a big problem. To stay aloft, the average density of the balloon envelope, lifting gas and gondola must be <= the density of the surrounding atmosphere. The pressure inside a balloon ...
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25 votes
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What cooling improvements did the Venera missions make?

According to Wikipedia launch windows to Venus occur every 19 months. In some cases multiple successful probes were launched with the same design at the same time so I'll group those together (the ...
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  • 7,106
25 votes
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Potential high temperature power sources for a Venus lander

Thanks to @MarkAddler for his search suggestions I've tried to balance length against completeness, and both lost here. However I have included enough material to try to be convincing that RTGs, ...
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  • 148k
25 votes

A balloon in the Venus atmosphere?

The Soviet Union actually deployed balloons on Venus, so I assume they studied them before that. https://en.wikipedia.org/wiki/Vega_program#Balloon
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24 votes
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Why would Sun-synchronous orbits be impossible around perfectly spherical bodies?

An orbit has an angular momentum that is conserved. That angular momentum vector keeps the orbit at a fixed orientation in inertial space. As a planet orbits the Sun, the local time of the ascending ...
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23 votes
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Maximum survivable atmospheric pressure

Based on saturation diving operations, it looks like the limits are as follows: Compressed air: Nitrogen narcosis limits you to around four times Earth's atmospheric pressure. Any gas mix: Hydreliox ...
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  • 11.5k
23 votes

Why is the atmospheric pressure on Venus so high?

The pressure exerted on a surface area under the ideal gas law is $P = \frac{\rho k_B T}{\mu}$ with the following notation: $\rho$ being the volume mass density (or simply density) $k_B$ is the ...
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21 votes
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Why did the Venera missions land so close together?

The simple answer is that taken as a whole the Venera missions didn't land particularly close together. Starting with Venera 4: The overall spread of Venera landing sites (when you include the ...
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  • 7,106
20 votes

Why was Venus rather than Mars targeted for the first interplanetary landings?

One picture is worth all your base to us. Before we sent probes to Venus we had no pictures of its surface. Whether it lands or not you have to penetrate the atmosphere of Venus to take pictures of ...
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  • 556
20 votes
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When did planetary scientists realize Venus' surface pressure was almost 100x that on Earth? How did they find out?

The early Venera probe hulls were designed for an atmospheric pressure of 25 bar. Barometers were designed for 10 bar. This was in line with what was then assumed to be the surface conditions. At the ...
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  • 121k
20 votes

Why is the Venus Climate Orbiter also called Planet-C?

It's the third in a series. Planet-A, "Suiseu" studied Halley's comet. Planet-B, "Nozomi" visited Mars. Looks like there's a Planet-D (PDF link) planned for visiting Venus, too.
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18 votes

How does Venus' thick atmosphere survive against the solar wind?

The mass of Mars is so small, and its magnetic field so weak that it cannot hold onto carbon for a long period of time, making almost all of it to escape. (Venus and Earth are close to identical in ...
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18 votes

Could we see the surface of Venus after the explosion of a H-bomb in its atmosphere?

No, because thermonuclear weapons don't make holes in clouds, they make clouds. First you have a fireball: And then you get a big mushroom cloud: Neither the fireball or mushroom cloud are see-...
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  • 18.9k
18 votes

Why not bring life to Venus along with the next exploring mission?

Question: Why not bring cyanobacteria and fertilizer to the atmosphere of Venus to improve conditions for life there by producing oxygen ? ... Only a few scientists have speculated that ...
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18 votes

When did planetary scientists realize Venus' surface pressure was almost 100x that on Earth? How did they find out?

The determination that Venus has a hellish surface is a great example of scientific detective work and its close association with technological advances that allow better and better measurements. In ...
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18 votes
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Was Venus once seriously believed to be lush under its cloud cover?

The same WP article on Venus in fiction referenced by the OP documents one specific scientist who believed, in a nonfiction sense, that Venus is indeed the world envisioned by mid-20th-Century writers:...
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  • 7,270
17 votes

What does the discovery of phosphine mean for the future of venusian exploration?

What does the discovery of phosphine mean for the future of Venusian exploration? It certainly adds some impetus. However, The discovery has not yet been independently confirmed. This alone is very ...
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16 votes
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A balloon in the Venus atmosphere?

Was there any proposal or study for a balloon in the Venus atmosphere? Yes and kudos to OrganicMarble's power of deductive reasoning! I am sure there have been several proposals or studies of this. ...
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  • 148k

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