Questions tagged [venus]

Questions regarding the second planet from the Sun.

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7
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0answers
75 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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1answer
122 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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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
106 views

Could H$_2$S$_2$O$_8$ (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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1answer
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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
69 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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2answers
1k views

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
100 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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2answers
153 views

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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2answers
258 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
538 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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1answer
5k views

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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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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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
187 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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1answer
287 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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1k views

Will the Parker probe use aerobraking at Venus? If not, why not?

The Parker probe needs to lose a great deal of orbital energy and angular momentum in order to approach the Sun so closely. It will be aided in doing that by multiple flybys of Venus. Are these purely ...
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Venus gravity assist (and aerobraking) - How much delta-V can it add?

The Voyagers made a grand tour using the gravity assist of each planet. But Jupiter, with a 12 year orbital period, doesn't always line up to be useful for spacecrafts destined to further planets. ...
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Venus Exploration [duplicate]

While reading an article about a possible "Cloud City" on Venus I was taken by the following statement: Venus’s atmosphere is mainly carbon dioxide and thick clouds of sulfuric acid cover the ...
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2answers
272 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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4answers
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When did planetary scientists realize Venus' surface pressure was almost 100x that on Earth? How did they find out?

The question Surface of Venus - what would it look like to see a spacecraft crushed by the atmospheric pressure? is a good one! That plus comments below this answer got me thinking first about just ...
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1answer
378 views

Surface of Venus - what would it look like to see a spacecraft crushed by the atmospheric pressure?

Assuming you send two landers to Venus that have an expected "surface life" of, say, 8 hours. The second lander arrives four hours after the first, parks up 100 yards away and trains a video camera ...
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1answer
105 views

Will asteroid 2015 YA have a collision with Venus in october 2018?

When you use the Small-Body Data Browser of JPL Solar System Dynamics and do the search for asteroid 2015 YA, and after that push the [ show orbit diagram ] button, you can see that on october 12, ...
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High pressure Helium tanks for the Vega balloon experiments

Is there any available (scientific) information on the properties of the high pressure Helium storage tanks, used for the Vega balloon experiments on Venus? Information on how big pressure gas they ...
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109 views

How could asteroid 2013 ND$_1$$_5$ become a moon of Venus with the aid of rocket engines?

Notice: Although this question is similar to this one, it is different because asteroid 2012 XE$_1$$_3$$_3$ has a transitional path between Venus's Lagrangian points L5 point and L3 point, whereas ...
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1answer
149 views

Could asteroid 2012 XE$_1$$_3$$_3$ become a moon of Venus with the aid of rocket engines?

2012 XE$_1$$_3$$_3$ is an asteroid, classified as near-Earth object of the Aten group that is a temporary co-orbital of Venus. It is following a transitional path between Venus's Lagrangian points L$...
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5answers
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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
202 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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2answers
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What's against the bringing of 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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4answers
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Could we see the surface of Venus after the explosion of a H-bomb in its atmosphere?

The dense atmosphere of Venus is mainly composed of carbon dioxide and nitrogen, with clouds made of sulfuric acid droplets, which make optical observation of the surface impossible. As can be seen ...
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3answers
233 views

Are the mountains of Venus of any help for us to explore the surface?

The circular orbit and small axial tilt results in no seasons, coupled with the well-known strong greenhouse that makes nights just as hot as days. As pressure gets lower by height, so does ...
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1answer
87 views

How to calculate mass of fuel for Venus Orbiter

I'm working on a hypothetical constellation of orbiters at Venus for a school project, and I am currently trying to figure out how much fuel I need in the transfer stage. I have already calculated ...
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Speculation. Will this “turning-co2-into-O2” zeppelin work in Venus? [closed]

Background: Me and a friend are trying to "colonize" Mars and Venus. He has Mars, and I have to "colonize" Venus. So, my intention was to do a slow terraform by creating zeppelins that convert CO2 ...
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1answer
470 views

Could there be caves/underground tunnels in Venus?

If so, would they have the same pressure/temperature than of the surface of Venus? How could we "scan" the surface to gather that kind of information? For reference, there are several images of lava ...
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1answer
137 views

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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227 views

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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138 views

What is the typical size of the sulfuric acid droplets in the atmosphere of Venus?

According to Wikipedia: Venusian clouds are thick and are composed mainly (75-96%) of sulfuric acid droplets. These clouds obscure the surface of Venus from optical imaging, and reflect about 75% ...
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4answers
4k views

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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4answers
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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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2answers
182 views

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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5k views

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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3answers
721 views

Mechanical computing hardware for a future Venusian rover? How does it work?

I don't know why Gizmodo says NASA's Latest Venus Probe Concept Looks Like a Tim Burton Creation, because it looks far more like a Theo Jansen creation! Compare videos below as well. I can understand ...
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1answer
600 views

Why do radar maps of the surface of Venus have missing slices?

The visually opaque clouds of Venus still pass radio and some microwaves, and so powerful radar signals can be used to map the surface. This is probably done using some kind of delay-Doppler technique,...
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1answer
547 views

Does Venus have a north star or south star?

I am trying to figure out how you would navigate on Venus. On Earth you can use Polaris as a North Star to find north. Would there be a star on the Venus sky which could function as either a north ...
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1answer
289 views

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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491 views

Is bypassing LEO more efficient when launching to Venus or Mars?

According to the table in the Wikipedia article on Hohmann transfer orbits, when traveling to Venus or Mars, the Δv to enter a Hohmann transfer orbit from Earth's orbit is less than the Δv from LEO: ...
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3answers
2k views

Potential high temperature power sources for a Venus lander

What power sources are viable on a 'long term' Venus lander? An RTG relies on a temperature differential, and is not likely to be doable with a 457C 'cold side'. Based on this answer there is not ...
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3answers
439 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
356 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, ...
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684 views

How would people measure time on Venus?

On earth we can divide our day into 24 hours, and 365 days in the year. I am trying to imagine how people living on airships above the cloud-tops would think about time on Venus given that a single ...