Questions tagged [venus]

Questions regarding the second planet from the Sun.

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

With all the speculation of manned missions to Mars, there is very little talk of a manned mission to Venus (whose orbit is closer to the orbit of Earth than mars is). That being said, would it be ...
jw01's user avatar
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46 votes
4 answers
10k views

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

This is a question about early planetary missions. It looks like there was only one early (unsuccessful) landing mission to Mars and that subsequently Venus became the target for interplanetary ...
user2705196's user avatar
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38 votes
1 answer
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 ...
PearsonArtPhoto's user avatar
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36 votes
1 answer
3k views

Why is there currently so little talk about a Venus gravity assist for a crewed Mars mission?

I just came across this video about manned Mars and Venus missions that were planned in the 1960s. They considered a Venus flyby the best way to get humans to Mars. Indeed, there are also modern ...
KarlKastor's user avatar
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34 votes
2 answers
44k views

Why is the rotation rate of Venus so slow?

Venus has an extremely slow rotation rate, to the point that it actually rotates slower than it revolves around the sun. In other words, its day is longer than its year. With the exception of Mercury, ...
PearsonArtPhoto's user avatar
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32 votes
2 answers
5k views

What are the teeth on the edge of Venera 13 and 14?

From top to bottom, Venera 9, 10, 13A, 13B, 14A and 14B. Venera 13 and 14 have some kind of teeth on the edge of the lander. What purpose do these serve? Why didn't Venera 9 and 10 have them?
usernumber's user avatar
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31 votes
4 answers
5k 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 ...
Nikolai Frolov's user avatar
29 votes
6 answers
19k views

Why is the atmospheric pressure on Venus so high?

The pressure on Venus is 1334 PSI (9.1976 MPa) or 92 times the pressure at sea level on Earth, which is 14.5 PSI (99.9734 kPa). Now, in our oceans the pressure increases by 14.5 PSI (99.9734 kPa) ...
Richard Wales's user avatar
26 votes
4 answers
3k 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 ...
uhoh's user avatar
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26 votes
2 answers
4k views

What would the Venus landers look like today?

Between 1966 and 1985, several probes, mostly of Soviet design, successfully landed on Venus. Many of them continued operating long enough to send back audio, images, and various measurements, though ...
Psychonaut's user avatar
24 votes
1 answer
3k views

What cooling improvements did the Venera missions make?

I've been reading about Russia's (former Soviet Union) Venera missions, and one thing about them that has impressed me is the incremental improvements the landers made in their lifespans before ...
duzzy's user avatar
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24 votes
1 answer
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Has any technology been demonstrated that allows a useful payload to survive at least one month on Venus' surface?

According to the Wikipedia article on Venera-D, A lander, based on the Venera design, is also planned, capable of surviving for a long duration on the planet's surface. The surface of Venus has ...
gerrit's user avatar
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24 votes
2 answers
3k views

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

The traditional explanation for rocky inner planets and large gaseous outer planets is that the outer planets are farther from the Sun, and therefore can hold onto large atmospheres that don't get ...
DrZ214's user avatar
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23 votes
3 answers
20k views

Maximum survivable atmospheric pressure

Given a similar mix of gases to those in our Earth's atmosphere, what is the upper limit of survivable atmospheric pressure for a human? Could a human survive higher pressures with a gas mix unlike ...
Ezra Bailey's user avatar
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22 votes
1 answer
2k views

Could an acid-proof, solar-powered aircraft stay aloft on the sunny side of Venus more-or-less indefinitely?

The length of Venus's solar day is 116.75 earth days ($t$ = 10,087,200 s) and it's radius, $r$, is 6051,800 m, so in theory an aircraft would only need to travel at a ground speed, $s$, of... $$s=2\pi ...
phil1008's user avatar
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20 votes
2 answers
3k views

Would terraforming Venus destroy its ionosphere?

In "Can Venus be made habitable?" we see that Venus's atmosphere would have to be substantially altered in order to terraform Venus. "Why has Venus's atmosphere not been stripped away by solar wind?" ...
called2voyage's user avatar
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20 votes
1 answer
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Was Venus once seriously believed to be lush under its cloud cover?

Mars was once believed to have canals, and some astronomers seriously argued that they were artificial. The atmosphere of Venus was first observed in 1761. Wikipedia kind of skips over the period ...
Wouter's user avatar
  • 1,106
19 votes
3 answers
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 ...
OrangePeel52's user avatar
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19 votes
2 answers
2k views

Can it be said that Venus is covered by an ocean rather than atmosphere?

At Venusian temperatures and pressures, CO2 becomes supercritical. This means it behaves as a dense liquid yet has no clear upper bound and continuously becomes gas with height. Can we thus say that ...
Anixx's user avatar
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18 votes
3 answers
4k views

What if a Space Shuttle entered the atmosphere of Venus?

How would a U.S. Space Shuttle's atmospheric entry on Venus differ from reentry on Earth? Say there's a Space Shuttle in a low Venus orbit performing a (re-)entry burn. How would the following ...
Greenhorn's user avatar
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18 votes
9 answers
7k 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 ...
Famous Jameis's user avatar
18 votes
1 answer
1k views

Why did the Venera missions land so close together?

I was reading about the Venera missions to Venus, and saw this map on Wikipedia: Venera 7 is missing from the map for some reason, but it landed at 5° S, 351° E, so it would have been very close to ...
duzzy's user avatar
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17 votes
5 answers
4k views

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 ...
Hash's user avatar
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17 votes
2 answers
1k views

What is the subsurface temperature profile of Venus?

Venus's surface is hot. If we dig and cover ourselves with regolith, will the temperature increase or decrease as we dig? If decrease, how far would we have to dig in order to have reasonable (say ...
Michael Stachowsky's user avatar
16 votes
4 answers
6k 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 ...
Cornelis's user avatar
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16 votes
2 answers
4k views

Why would Sun-synchronous orbits be impossible around perfectly spherical bodies?

This is a special case follow-up to Are sun-synchronous orbits possible around any body? Reading Wikipedia on Sun-synchronous orbit a few days ago when trying to refresh my memory on orbital mechanics ...
TildalWave's user avatar
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16 votes
2 answers
1k 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 ...
Him's user avatar
  • 262
16 votes
1 answer
5k views

Does a mission to Venus orbit require less propellant than a similar mission to Mars?

Gravitational attraction is determined using G (m1m2)/r^2 Which indicates the force is inversely proportional to the square of separation of the bodies Of the terrestrial planets Mercury, Venus, ...
Everyone's user avatar
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16 votes
1 answer
2k views

Why wasn't the phosphine in Venus' atmosphere detected by space probes?

Today, it was announced that phosphine has been found in Venus' atmosphere, rekindling the discussion about the possibility of extraterrestrial life. Venus has been visited by space probes for about ...
Glorfindel's user avatar
16 votes
1 answer
833 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, ...
uhoh's user avatar
  • 149k
15 votes
3 answers
2k views

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

The Soviet Union's (in cooperation with some European governments like France and West Germany) Vega missions put balloons in the atmosphere of Venus back in 1985. It was 30 years ago, the last ...
LocalFluff's user avatar
15 votes
3 answers
739 views

Will or could the Parker Solar Probe do science at Venus?

Solar Probe Plus will flyby Venus 7 times(!) during 6 years in order to enter its "low" Solar orbit. Will it carry any instrument useful for studying Venus, for example seasonal changes? Would its ...
LocalFluff's user avatar
15 votes
1 answer
364 views

How long could Solar Impulse fly in the Venerean atmosphere?

Extremes of temperature, and pressure serve to effectively constrict the life-span of a PV cell on the Venerean surface. Despite the cloud cover, the Venus' proximity to Sol makes for upto 1km ...
Everyone's user avatar
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15 votes
2 answers
906 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. ...
uhoh's user avatar
  • 149k
14 votes
2 answers
2k 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: ...
Cornelis's user avatar
  • 7,503
14 votes
1 answer
2k views

How long will it be light on Venus at night?

The atmosphere of Earth bends light such that there is still light after the sun goes down for a period of time. How would such effects appear on Venus, given the thicker atmosphere?
PearsonArtPhoto's user avatar
  • 121k
14 votes
1 answer
7k 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 ...
coleopterist's user avatar
  • 6,043
14 votes
1 answer
614 views

Parachute material used for the Venera probes to survive 500 °C

The Venera landers of the former Soviet Union were quite successful on the very hot surface of Venus. Which material was used for the parachutes to survive 500 °C? What about cotton wool? Yes this ...
Uwe's user avatar
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13 votes
1 answer
1k views

How certain are we that we have not accidentally sent life to other planets/moons?

Recently phosphine was discovered on Venus, and that led to some speculation that life exists on Venus because phosphine is a known biosignature on Earth. Considering that we've sent probes to Venus ...
Allure's user avatar
  • 309
13 votes
1 answer
11k views

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 ...
Anthony Neace's user avatar
12 votes
2 answers
2k views

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

The Venus Climate Orbiter is also known as Akatsuki and Planet-C. Why is a Venus spacecraft called Planet-C? Venus is the second planet from the Sun, but C is the third letter of the alphabet.
DrSheldon's user avatar
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12 votes
1 answer
2k views

What happened to Mariner 2 after it flew by Venus?

I found myself wondering about what ever had happened to the Mariner 2 spacecraft (the first successful flyby of any planet) after it flew by planet Venus. According to apesinspace.co it "...
Deko Revinio's user avatar
  • 1,474
12 votes
3 answers
496 views

How brightly does Venus's hot surface glow at night? Could you see it? Could you see well enough to walk around?

NASA's Parker Solar Probe Captures its First Images of Venus' Surface in Visible Light, Confirmed links to the new Geophysical Research Letter Parker Solar Probe Imaging of the Night Side of Venus. ...
uhoh's user avatar
  • 149k
12 votes
2 answers
572 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 ...
James Jenkins's user avatar
12 votes
1 answer
589 views

Does Venus have doldrums or horse latitudes (latitudes with lower winds)?

Because of all the heat fueling convection cells, Venus has some brisk winds especially in the upper atmosphere (up to 370 km/h). I realize the winds are quite slow at the surface, but are there any ...
King-Ink's user avatar
  • 381
12 votes
1 answer
192 views

What are the moving particles that can be seen by the Parker Solar Probe?

There ate two images below from the Parker Probe, one of Venus and the second from the Sun. The second one is a screenshot from a recent video (Youtube of Parker imagery while in solar corona). In ...
KingsInnerSoul's user avatar
12 votes
3 answers
901 views

Phosphine, yes -- but where are the organic compounds on Venus?

There has been much speculation in recent news about the finding of phosphine on Venus, and what may be producing it. At the same time, when we look for clues of life elsewhere in the Solar System, we ...
Oscar Lanzi's user avatar
  • 8,495
11 votes
3 answers
3k views

A balloon in the Venus atmosphere?

Was there any proposal or study for a balloon in the Venus atmosphere? A spacecraft can enter in the atmosphere and inflate a balloon to fly for a few days or weeks. That can help collecting a lot of ...
Joe Jobs's user avatar
  • 2,610
11 votes
2 answers
3k views

Are there currently any plans for a Venus lander?

I am interested in what the surface of Venus looks like in true color, but have discovered that true color images of Venusian surface are rare, and am hoping that a lander mission is planned to take ...
Gstestso's user avatar
  • 817
11 votes
3 answers
771 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 ...
kim holder's user avatar
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