Questions tagged [venus]

Questions regarding the second planet from the Sun.

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1answer
138 views

What are the questions and issues related to Kosmos 482's configuration and eventual reentry?

The Space.com article Failed 1970s Venus Probe Could Crash to Earth This Year describes Kosmos 482 (1972-023A, 5919), a 1972 Soviet Venus lander spacecraft that got stuck in LEO instead. Since the ...
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2answers
238 views

How far can you see on the surface of Venus?

As from the images by Venera probes, it seems to me that on Venus you can't see as far as on Earth, e.g. you can't see the horizon, because it's so misty there. Venera 9 and 10 shots.Venera 14 shot. ...
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6answers
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Venus vs Mars for colonization

Why is Mars getting so much attention vs Venus, which to me seems like a much more attractive option, in regards to habitability. I've read that the upper atmosphere of Venus has the most Earth-like ...
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1answer
48 views

When is the next Transit of Venus from Mars?

When will the next transfer of Venus take place from the perspective of Mars? Will the next human to view one be a Martian?
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1answer
143 views

To cool down Venus, from where would be the most economical way to bring the shadowing material into orbit around the planet?

Edit: With the help of comments below, I've changed the question somewhat. Credit: NASA, Image processed from Mariner 10 images by R. Nunes http://www.astrosurf.com/nunes It could seem that ...
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1answer
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What material properties would be necessary to shield a lander from the environment of the Venusian surface?

On March 1, 1982, the Venera 13 lander survived for 127 minutes in an environment with a temperature of 457 °C (855 °F) and a pressure of 89 Earth atmospheres (9.0 MPa). This says nothing of the ...
13
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1answer
501 views

Would it be possible to “ride the wave” on Venus?

Update: Newly published paper in Nature Geoscience Atmospheric mountain wave generation on Venus and its influence on the solid planet’s rotation rate has open-access links in Science News, ...
4
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1answer
195 views

Could a solar sail composed of smart glass stay near the L1 point of Venus?

From answers to this question i've learned that the Lagrangian L$_1$ point of Venus is not stable, despite the almost circular orbit of the planet and the fact that it has no moon. Nevertheless would ...
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Venus-Mars-Venus cycler?

Is it possible to create a cycler that can travel from Venus to Mars, then back to Venus? Using as little delta-V as possible. To expound a bit further, it would need to travel from Venus to Mars ...
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5answers
5k views

Changing the rotational rate of a natural body

Let's say that for the purpose of terraforming, we need to speed up the rotation of a planet (like Venus), a moon or an asteroid to near Earthian day. How would we go about doing this? Can this be ...
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58 views

Surface Rock Temperature of Venus

The average surface temperature of Venus is said to 460 degrees Celsius. What I'd like to know, is that the temperature of the air in contact with an near the surface, or is that the temperature of ...
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1answer
152 views

Heat shield on Venus

On Venus, the conditions are really extreme in terms of heat and pressure. Say we take many layers of rockets' lab heat shield for Electron (which I am not sure what is made of). Could it provide ...
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What performance can be expected from chemical rockets under Venusian atmospheric conditions?

Is it feasible to use either solid or bipropellant liquid rocket engines to lift off from the surface of Venus? "Reference datum" air pressure on Venus is around 9.3 MPa; even on the top of, say, ...
14
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2answers
256 views

Launch to orbit delta-v penalty from Venus compared to Earth?

Thinking about the no atmosphere caveat here made me think of Venus, which is the opposite of no atmosphere for solid/rocky bodies in our solar system. Earth's low orbital velocity is about 7.8 km/s. ...
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2answers
88 views

Why did ESA's Solar Orbiter mission's target inclination drop from 34 to 25°?

Wikipedia says that: During the planned 7-year mission the orbital inclination will be raised to about 25° But the information below shows that originally the target final inclination was much ...
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296 views

Could H₂S₂O₈ (peroxydisulfuric acid), made in the clouds of Venus, be used for making a propellant?

The salts of the peroxydisulfate ion, S$_2$O$_8$$^2$$^-$, are strong oxidants like the perchlorates that are used in propellants for rockets. In this answer on Chemistry stackexchange is a link to a ...
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Could a fan be used to prevent overheating on a Venus bound space probe?

I saw something saying that the circuits on a Venus bound space craft would overheat and basically ruin the the spacecraft. Is that true? If so, could they install fans to keep the circuits cool?
4
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2answers
164 views

What is the atmospheric composition of Venus at the 34 mile (50 km) altitude of the proposed HAVOC program?

Various people over the past 60ish years have suggested floating habitats in the high-altitude Venusian atmosphere, as the pressure, gravity, and temperature are comparable to Earth. The premise is ...
6
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1answer
319 views

What would be the challenges for a 50 km long tether to the surface of Venus to get recurrent surface samples there?

Basalt fiber would be an excellent material for a tether in the atmosphere of Venus because it could withstand both the acidity and the high temperature near the surface there. From this answer ...
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1answer
387 views

What is the surface temperature distribution of Venus?

I can find lots of resources stating the average surface temperature. However, I have found conflicting reports concerning the distribution of temperatures on the surface. For example, the Venus ...
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1answer
125 views

Is the retrograde (clockwise) rotation rate of Venus speeding up or slowing down?

In the update of the question "Would it be possible to "ride the wave" on Venus ?" there are links to articles in Science and in Science News that report that the atmosphere of Venus, hitting the ...
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Why not bring life to Venus along with the next exploring mission?

Why not bring cyanobacteria and fertilizer to the atmosphere of Venus to improve conditions for life there by producing oxygen ? Planetary protection could be a reason. According to Wikipedia: ...
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1answer
120 views

Venus without the greenhouse

What would have been the approximate surface temperatures and pressure on Venus if its atmospheric composition was like the Earth's that is ,being composed primarily of nitrogen and oxygen,rather ...
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Why is the atmospheric pressure on Venus so high?

The pressure on Venus is 1334 PSI or 92 times the pressure at sea level on Earth, which is 14.5 PSI. Now, in our oceans the pressure increases by 14.5 PSI every 33 feet. So, we're told that the ...
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Stability of Lissajous orbits around Sun-Venus L1

How far is it from the Venus? Does Mercury gives too big perturbations for a stable Lissajous orbit?
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1answer
157 views

Piece of debris in Venera 13 surface photos

(Source: Smithsonian National Air and Space Museum) In the Venera 13 Surface photo there is a piece of debris visible (the big thing slightly left of center). It looks like a sort cover, but maybe ...
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4answers
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When will we send floating probes to Venus?

Recent plans on human missions to Mars have sparked many discussions, one of which is about if we should colonize Venusian upper atmosphere with Zeppelin like floating ships and cities first. NASA ...
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99 views

Should there not be a sulfuric acid free zone in the atmosphere above the equator of Venus?

The circulation in the troposphere of Venus follows an almost purely zonal flow, with windspeeds of about 100 m/sec at 60-70 km altitude, which corresponds to the upper cloud deck. These winds quickly ...
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1answer
127 views

Could the sulfuric acid in the atmosphere of Venus be heated enough by concentrated sunlight to create water and oxygen?

The atmospheric pressure and temperature at about 50 to 60 km above the surface of Venus is nearly the same as that of the Earth, making its upper atmosphere the most Earth-like area in the Solar ...
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1answer
231 views

Is really almost all the water in the atmosphere of Venus above the clouds?

In this question about the amount of sulfuric acid in the atmosphere of Venus it is calculated that the amount of water in it's atmosphere is $9.6 \times 10^{15} \text{ kg }$ H$_2$O. In one of the ...
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1answer
82 views

Would it be achievable to use the first stage of a launch to Venus as the envelope of an airship in its atmosphere?

Like the Orbiter Vehicle of the Space Shuttle was mounted on its external tank, the "gondola", the crewcar of the airship, could be likewise mounted on the last stage of the launch rocket, that would ...
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Can Venus be made habitable?

Atmosphere of Venus consists predominately of Carbon dioxide and Nitrogen. Is it possible to convert the atmospheric Carbon dioxide into Oxygen with the help of bacteria by photosynthesis, and make ...
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349 views

How was the radius of Venus measured so accurately (± 3 km) via radar in the mid 1960's, before Venera 4 and Mariner 5?

In several answers to the question When did planetary scientists realize Venus' surface pressure was almost 100x that on Earth? How did they find out? the known radius of Venus is mentioned. It was ...
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Does turbulence make sky cities infeasible on Venus?

It has been proposed that Venus' atmosphere at the altitude of around 50 km could be colonized with large aerostats. Since Venus' atmosphere is largely CO2 regular air acts like a lifting gas. So it ...
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1answer
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Could the Saturn V actually have launched astronauts around Venus?

One of the more interesting proposed uses of a Saturn V was to launch a manned flyby of Venus. Some of the cargo would have been stored inside the tank of the upper stage, which would be retained ...
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1answer
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Why not simulate certain regions of the atmosphere of Venus?

Many people would like to know if any form of life could survive anywhere in the atmosphere of Venus. Researchers have simulated conditions on Mars and found that after a month some cyanobacteria ...
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3answers
462 views

Is there likely to be life in Venus's upper atmosphere?

From what I understand, Venus's upper atmosphere is much more habitable than its surface, with a temperature and pressure that humans could tolerate. However, lack of oxygen and the presence of ...
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1answer
104 views

How were the Vega balloons deployed?

The Vega mission included balloon deployment into Venus' atmosphere. Deploying weather balloons on Earth is easy, but i imagine it is quite complicated in other planets' atmosphere from a spaceship. ...
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1answer
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Could metal sulfates stay in the sulfuric acid layer of Venus?

For cyanobacteria metal ions like K+, Mg+ and other essential nutrients like phosphorus are vital for growing and to expand. So they could only thrive in the clouds of Venus if at least metal ions ...
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How to come back from a Venus cloud station?

I heard of the idea of having a manned station floating in the atmosphere of Venus, where the pressure is roughly equal to earth sea level. The idea is exciting, but what I don't understand is how ...
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398 views

Why doesn't NASA plan a manned Venus flyby first? [closed]

After America will have returned to the Moon, why won't NASA make a Venus flyby mission with the Orion/SLS before going on to manned flights to Mars? They are planning crewed missions to Venus (...
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1answer
555 views

How did the Venus Express detect lightning?

I found it very interesting (especially the sound recording) of the Venus Express detecting lightning on the planet Venus. I found it strange watching the ' national geographic ' video about the ...
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Are there any updates / follow ups on the HAVOC Venus exploration concept?

The HAVOC concept for exploring Venus with airships has been made public almost three years ago now, but the scientific publication seems to never have been cited, neither am I aware of any official ...
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1answer
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Archimedean braking for low density Venus lander + subsidiary question

Subsidiary question: Imagine a sphere 10cm in diameter in low venusian orbit. Slow it down a little in order to deorbit it. What's the density of the sphere, in order to touch the ground at 0 vertical ...
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1answer
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Does exploration of Venus' atmosphere now require any planetary protection protocols?

This answer quotes Marc Rayman's August 21, 2018 Dawn Journal entry: Not all solar system bodies need such protection. The Moon, Mercury and Venus, for example, have not been of interest for ...
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478 views

Around Venus in 8 days by Balloon?

The question Would a human colony on Venus be possible? received an answer showing how inhospitable the surface is. But combined with comments to the answer implies that a station in the upper ...
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3answers
586 views

How could the proposed floating base in the atmosphere of Venus receive supplies?

I'm a big fan of the floating aerostat concept developed by Geoffrey Landis for colonizing Venus. But how would you supply a floating base? It would be an awfully small target to aim a vessel at. The ...
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2answers
351 views

What would it feel like to walk on Venus's surface?

The conditions on Venus's surface are extremely harsh. I'm trying to conceptualize what it would be like to walk on the surface through supercritical carbon dioxide. Obviously we must neglect the high ...
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Will thinning the atmosphere of Venus make its surface habitable?

I have no idea about this thing, but since Mars is on the table, why not Venus? It has comparatively better gravity and a big enough surface. Also, maybe we can harvest its atmosphere and use it ...
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908 views

Fixing Carbon in Venus's Atmosphere

I often wonder about fixing the carbon the atmosphere of Venus. Whilst there is no water meaning this is unlikely to be possible using biological means, is it possible that some kind of machine could ...