Questions tagged [venus]
Questions regarding the second planet from the Sun.
113
questions
0
votes
0answers
40 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 ...
4
votes
1answer
88 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 ...
3
votes
1answer
153 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 ...
11
votes
0answers
106 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. ...
5
votes
1answer
128 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 ...
4
votes
0answers
91 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 ...
1
vote
1answer
111 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 ...
3
votes
1answer
99 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 ...
0
votes
1answer
72 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 ...
5
votes
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 ...
4
votes
1answer
102 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.
...
8
votes
2answers
157 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 ...
-3
votes
2answers
295 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 (...
8
votes
1answer
542 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 ...
34
votes
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 ...
6
votes
1answer
126 views
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 ...
2
votes
0answers
72 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 ...
5
votes
2answers
212 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 ...
10
votes
1answer
295 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 ...
6
votes
2answers
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 ...
3
votes
0answers
92 views
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. ...
2
votes
0answers
48 views
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 ...
4
votes
2answers
283 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 ...
19
votes
4answers
2k views
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 ...
5
votes
1answer
452 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 ...
2
votes
1answer
108 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, ...
1
vote
0answers
33 views
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 ...
1
vote
0answers
111 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$$_3$ has a transitional path between Venus's Lagrangian points L5 point and L3 point, whereas ...
1
vote
1answer
152 views
Could asteroid 2012 XE$_1$$_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$...
15
votes
5answers
2k views
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 ...
5
votes
1answer
207 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 ...
14
votes
2answers
1k views
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:
...
14
votes
4answers
5k views
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 ...
3
votes
3answers
240 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 ...
2
votes
1answer
91 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 ...
2
votes
0answers
83 views
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 ...
4
votes
1answer
500 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 ...
6
votes
1answer
139 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 ...
8
votes
1answer
233 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 ...
4
votes
0answers
140 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% ...
26
votes
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 ...
7
votes
4answers
1k views
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 ...
7
votes
2answers
184 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 ...
12
votes
5answers
6k 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 ...
5
votes
3answers
726 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 ...
8
votes
1answer
624 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,...
2
votes
1answer
594 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 ...
8
votes
1answer
290 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 ...
7
votes
2answers
501 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:
...
17
votes
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 ...
