Questions tagged [venus]

Questions regarding the second planet from the Sun.

Filter by
Sorted by
Tagged with
6
votes
1answer
186 views

Premature detonation of explosive bolts when landing on hot Venus?

@Uwe's comment below Parachute material used for the Venera probes to survive 500 °C raises an interesting issue. Venus is really hot, and pyrotechnic actuators (e.g. explosive bolts, frangible ...
5
votes
1answer
113 views

How did the Venera Probes manage to safely descend to the surface of Venus?

I have a two part question in reference to the answers provided for the linked question below: Why did the Venera missions land so close together? The answer stated: ”Not only did they land near local ...
13
votes
1answer
192 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 ...
7
votes
2answers
128 views

Can I observe a Venus transit before 2117 from a spacecraft in the Earth-Moon neighbourhood?

The Astronomy SE side of things is clear: The next Venus transit is in 2117. Good things they come in pairs, the 2004 had too many clouds for me, but 2012 was excellent. That means I will not see a ...
4
votes
0answers
82 views

Is Geothermal Cooling on Venus Possible?

Would geothermal type cooling be possible for a stationary base on the surface of Venus? Would the subsoil temperature of Venus hotter or cooler than the atmospheric temperature? (464C / 867F average ...
16
votes
2answers
773 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 ...
1
vote
0answers
48 views

Could the phosphorus in phosphine in the Venus atmosphere probably produced by cosmic ray spallation of sulfur? [closed]

Reading the following questions and their answers: Why wasn't the phosphine in Venus' atmosphere detected by space probes? Phosphine, yes -- but where are the organic compounds on Venus? the ...
33
votes
1answer
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 ...
0
votes
0answers
29 views

If we could manipulate the orbits of bodies, how big of an object would be needed to impact Venus to create a moon?

https://en.m.wikipedia.org/wiki/Giant-impact_hypothesis The Giant Impact hypothesis for our own Moon explains not only our Moon but how our molten mantle got "stirred" enough to create our ...
4
votes
1answer
88 views

Has Akatsuki searched for phosphine in Venus?

The Akatsuki orbiter is never mentioned in articles about the phosphine discovery, does it have the capability to detect it and has it tried?
11
votes
2answers
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.
2
votes
1answer
208 views

Venus probe with refrigerated electronics powered by an RTG (more like the Mars rovers)

Because of the very high surface temperatures on Venus (~450 oC) conventional semiconductor electronics will not work. Discussion of surface probes to Venus talk about using vacuum electronics, ...
18
votes
3answers
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 ...
6
votes
2answers
235 views

Why is there no plan for a Venus orbiter by ESA or NASA?

A rather complete-looking Wikipedia List of solar system probes enumerates only a few proposed future missions to Venus: Reading popular science magazines suggests that it would make sense to go ...
1
vote
1answer
53 views

How do space agencies choose arrival dates to planets (i.e. Mercury) from a gravity assist (i.e. Venus)?

Assuming I was looking for arrival opportunities from 2020 to 2030, how can I calculate the possible arrival dates to Mercury given a departure date from a gravity assist from Venus?
1
vote
1answer
77 views

What are ALL the characteristics for for human habitability of worlds?

We've got a good head start at our original table here, but is there anything else we need or have missed that impact on human habitability of worlds? It's helpful to compare and contrast places in ...
4
votes
0answers
63 views

What's the current state of Venus orbital infrastructure?

As per this Wikipedia article there have been a total of 5 orbiters successfully deployed to Venus: Venera-15 Venera-16 Magellan Venus Express Akatsuki Of which only the Akatsuki seems to be ...
9
votes
2answers
218 views

Vacuum tube microchips for Venus probe; feasibility and challenges?

Venus surface temperature is around 460 °C which makes conventional semiconductors useless. So nasa proposed a clockwork rover, drawing power from wind and using springs and gears to navigate the ...
4
votes
2answers
757 views

What is the closest distance a human being has come to Venus ever since the beginning of the space age?

In line with this question, ever since we started space exploration, what is the closest a living human being has come to Venus? All I can find on this matter is that the closest distance Venus and ...
1
vote
1answer
97 views

Arrhenius' calculation of the temperature of Venus

In this answer, we learn that in the early 1900s, Nobel Prize winner Svante Arrhenius believed that Venus was covered in lush swamps. His book on this matter, "the destinies of the stars", ...
3
votes
2answers
260 views

How to determine heat transfer for survival on Venus?

I'm trying to determine how long a probe could survive on Venus' surface. Assuming its just a sphere of titanium with room temperature air inside, what would be the best method for determining the ...
9
votes
2answers
843 views

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

There have been proposals (1, 2, 3, 4,...) to send probes into the atmosphere of Venus, but these proposals haven't been selected by space agencies to fly. Some balloons were sent in the 80's, but ...
7
votes
2answers
241 views

Is the surface environment of Venus corrosive?

Venus famously has clouds of concentrated sulfuric acid in its upper atmosphere. Frequently I will see posts here citing the acidity of the atmosphere as a challenge to probes on the surface (such as &...
11
votes
1answer
949 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 ...
2
votes
1answer
205 views

Why did the Soviet Union stop exploring Venus in 1985?

Wikipedia has a list of missions to Venus. The Soviet Union has the first and highest number of both attempts and successful missions to Venus. Starting in 1961, they often attempted more than one ...
8
votes
1answer
2k views

What altitude would an aphrodiosynchronous satellite need?

A geosynchronous orbit has a period of 24 hours, and mostly stays over the same location on the surface of the Earth. According to this blogger, the equivalent term for Venus should be "...
4
votes
1answer
108 views

What is the Opaque Component of Venus' Atmosphere

My understanding is that carbon dioxide makes up the majority of the Venusian atmosphere, and carbon dioxide is transparent. Even liquid CO2 is transparent! Yet despite this Venus is enveloped in a ...
24
votes
1answer
3k 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 ...
3
votes
0answers
55 views

How did 20 radio observatories track balloons of the 1985 Venus-Halley (VeGa) mission in Venus' superrotating winds at an altitude of about 54 km?

Links in Phys.org's recent The detection of phosphine in Venus' clouds is a big deal, and here's how we can find out if it really is life lead to: Aerial Platforms for the Scientific Exploration of ...
10
votes
3answers
2k 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 ...
17
votes
1answer
3k views

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 ...
10
votes
1answer
185 views

Significance of Venus surface photos

Out of curiosity, I started looking for photos of Venus surface taken by various Russian probes. There is a nice collection here: http://mentallandscape.com/C_CatalogVenus.htm Not being a geologist, I ...
12
votes
3answers
581 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 ...
15
votes
1answer
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 ...
8
votes
0answers
134 views

How often have signs of life been dismissed as abiotic?

Today, there are rumors about an upcoming announcement of the discovery of (non-conclusive) evidence for life on Venus, apparently they detected some phosphorus compound that is not produced by any ...
3
votes
1answer
121 views

How much payload capacity is available for a Rocketlab Photon interplanetary mission to Venus?

I've been quite interested in Rocketlab's Photon satellite bus, which they claim to be able to send to Venus. I'm trying to get some kind of an idea of what kind of payload might possible be able to ...
2
votes
2answers
305 views

Harvesting Venus atmosphere to Terraform Mars

Since Mars has such a thin atmosphere, to Terraform we would need massive amounts of Nitrogen. Would it make sense to import it from Venus? Also since venus's atmosphere is mostly co2, and we can make ...
45
votes
6answers
10k views

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 ...
2
votes
0answers
133 views

Mining Venus' surface using lasers?

One of the issues with colonizing Venus is the harsh conditions at the surface. People have proposed using floating habitats in the upper atmosphere, where conditions are milder, and gathering ...
3
votes
0answers
74 views

Taking photos from Venus surface from an airship. Possible?

On planet Venus at ground level temperature level is about 450°C which seems to high for electronic devices such as a camera. Could electronic devices and a camera on a airship just below the clouds ...
-3
votes
3answers
187 views

Using Venus' Atmosphere to Cool the Earth [closed]

The Starfish Prime nuclear test on July 9, 1962 caused massive fluctuations and degradation of the Earth's magnetic field. This field is largely responsible for redirecting the Sun's solar radiation. ...
32
votes
2answers
4k 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?
8
votes
2answers
339 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. ...
2
votes
1answer
120 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?
-2
votes
1answer
191 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 ...
4
votes
2answers
168 views

Surface Rock Temperature of Venus

The average surface temperature of Venus is said to be 460 degrees Celsius. What I'd like to know, is that the temperature of the air in contact with and near the surface, or is that the temperature ...
2
votes
1answer
240 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 ...
7
votes
0answers
150 views

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, ...
2
votes
2answers
121 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 ...
8
votes
5answers
6k views

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?