Questions tagged [water]

Questions about research and use of water in space environment

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52
votes
2answers
44k views

What is the purpose of the jets of water often under rocket engines during launch?

I have watched several STS launches, and noticed that there were always huge jets of water that would begin right before the rocket engines lit. They were right under the rocket, mounted to the pad. ...
5
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6answers
756 views

What's the scientific evidence of water for return trip methalox on Mars?

EDIT: I am not asking if you think finding water is necessary for a return flight. I'm asking for the scientific evidence that there is mineable water on Mars that could be used for this purpose. ...
8
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6answers
961 views

Will suits worn on Mars lose kilograms of “expendable water” each time they are used?

In this excellent answer I learned that space suits from the Apollo missions and even when used in space walks from the ISS today use water sublimation to remove both body heat and other heat ...
30
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2answers
43k views

What thickness/depth of water would be required to provide radiation shielding in Earth orbit?

If using water or ice as a radiation shield how thick/deep would it need to be? Would it make a difference if the water was frozen (water ice being less dense then liquid)? Edit I would like to ...
17
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4answers
4k views

How would swimming on Mars feel, given the lower gravity?

The hypothetical swimming pool is inside a habitat at atmospheric pressure, and on Mars at 0.38g of Earth. What are the major differences regarding water properties (viscosity, surface tension, ...
23
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8answers
4k views

Is there any economical way to move the water from the Martian poles to the people?

update: Water at the poles has some more recent news: Science: 03-August-2018 Radar evidence of subglacial liquid water on Mars EarthSky.org: 28-Sept-2018 Pink lagoon provides clues to possible Mars ...
12
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4answers
2k views

Boiling ponds and pools on Mars?

In the related questions Can you take a bath on Mars? & How would swimming on Mars feel, given the lower gravity? we learn that bathing and swimming on Mars is much like it is on Earth. Some ...
3
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1answer
257 views

How to get water inside a space suit?

How is water transferred from outside the suit to inside the suit?
16
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2answers
2k views

What was the source of the fluid in Luca Parmitano's suit?

There has been a lot of press (example) and commentary about the near drowning in space of Italian astronaut Luca Parmitano on July 16, 2013. We have a question Would the blast clearing technique ...
12
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1answer
2k views

Is water on-board space-craft (such as ISS) rationed?

An NIH abstract writes to say A daily water intake of 3.7 L for adult men and 2.7 L for adult women meets the needs of the vast majority of persons. Is water on-board space-craft (such as ISS, ...
11
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3answers
774 views

Will uncovering the ice deposit in Utopia Planitia improve the climate on Mars?

In 2016 a large ice deposit has been found within the Utopia Planitia region on Mars by the SHARAD instrument on board of the Mars Reconnaissance Orbiter. The thickness of the deposit ranges from ...
7
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2answers
627 views

What forms of water ice have been observed and verified in the solar system?

The cool plot in this answer (from here) got me thinking about the more than sixteen distinct forms of ice, and how many of them have been actually seen to occur naturally in the solar system. There ...
4
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1answer
1k views

Mars' atmosphere and the triple point of water

As I understand it, the average atmospheric pressure at the surface of Mars is close to the triple point of water. Is this a coincidence or does water have some sort of controlling effect on Mars' ...
138
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5answers
36k views

Nudism in space: Why wear clothes anyway?

Currently, doing laundry in microgravity is an unsolved engineering problem. The result is that clean clothes on the International Space Station have become a consumable resource. Clean clothes get ...
19
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4answers
1k views

Could any life from Earth survive in Enceladus' oceans?

Enceladus, the sixth-largest moon of Saturn, is probably unique in being the only body in our solar system besides Earth (and possibly Europa) to have significant amounts of liquid water. Most of this ...
21
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1answer
534 views

Would the blast clearing technique used in snorkeling work in an EVA situation?

Luca Parmitano wrote about his experience with water filling his helmet during EVA on the International Space Station. It's a harrowing account and he explains part of his thought process: I force ...
19
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1answer
1k views

Is potable water in the American & Russian segments still stored separately?

This article writes to say An interesting fact is that the Russian and American segment water supplies can’t be mixed. The U.S. water uses iodine for bacteria control, while the Russian water uses ...
15
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1answer
1k views

How do they conduct electrolysis in zero gravity?

I'm building an electrolysis cell myself, and got to wondering. On Earth, there is a significant force pushing bubbles of hydrogen and oxygen upward, so your electrodes still contact mainly water. ...
12
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3answers
5k views

Could a Soyuz land in water?

While watching Soyuz exp. 37/1 land, I was struck with a thought: that capsule looks an awful lot like a submarine. This seems to be a problem if the crew ever needed to make an emergency landing ...
10
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4answers
2k views

If there is actual ice on the moon, why hasn't it sublimated?

The Ars Technica article NASA seeks industry help with lunar landings, potentially sample return discusses the potential value of ice on the moon as a source for fuel in future space missions. Ice ...
6
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2answers
407 views

Scuba diving in free fall, do I need to worry about the Bends?

The Integral Trees is a 1984 science fiction novel by Larry Niven with an entire ecological system of oxygen breathing people and creatures, in free fall, in a gas torus. Water forms ponds, lakes, and ...
11
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1answer
302 views

Liquids Plumbing on board

When a cargo mission is flown toward the ISS, there are at least four different kinds of liquids that may need to be moved into/out of the station: Propellant for Zvezda's thrusters Water Wastewater ...
4
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1answer
130 views

What are the technologies that can identify, validate, and quantify water-rich locations on Mars?

As the discussion progresses from the likelihood that there is water on Mars through yes, near the poles, now to to Is there really a frozen lake near the equator on Mars? and There's a lot of ...
3
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1answer
2k views

Have there been any determinations of the water pressure in Europa's ocean just below the ice?

In this answer there is discussion of the possible role of pressure at the top of Europa's ocean in the ability of the recently observed vapor plumes to reach 100 to 200 kilometers above the surface. ...
2
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3answers
4k views

Is it possible to energize a steam rocket enough to go to space?

So I've been making small steam rockets and I was just wondering if I had a huge power plant connected to an electrical heater inside the rocket and heated enough to bring the pressure and temperature ...
45
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6answers
9k views

Can/should you swim in zero G?

Inspired by Are there types of animals that can't make the trip to space? (physiologically) and related to but not a duplicate of Can you swim in space?... Swimming on the moon / in low gravity ...
26
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2answers
804 views

How to explore subsurface oceans (cheaply)?

There are dozens of speculative proposals to explore Europa, Enceladus, and possibly other Solar System bodies (including Sedna and other Trans-Neptunians!) that may be endowed with liquid water under ...
22
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3answers
5k views

Is water on Mars the same as Earth water?

I would like to know how similar Mars water is to Earth water. Can we survive on Mars with Martian water without any major health issues etc?
13
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3answers
895 views

Does it snow in LEO?

How does water spray behave in Low Earth Orbit (LEO), from the side exposed to the Sun to the side in Earth's shadow? Could it be used as means of augmenting atmospheric drag and deorbiting defunct ...
11
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2answers
540 views

How does a water based acoustic suppression system work?

Now a days every rocket launch (except Russian or cliff hanging launch) happens using water acoustic suppression system. How does the water based acoustic suppression works? What is the water ...
18
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3answers
1k views

My space station is filling with water

This question may be a bit silly, but this video of Chris Hadfield wringing out a wet washcloth on the ISS got me thinking... In the video you can clearly see drops of water floating away from the ...
13
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3answers
537 views

Has water ever been confirmed on comets?

I am watching a documentary called "The Electric Comet," and the narrator claims that water has never been collected or detected from comets. This should be a surprising result as standard theory ...
9
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3answers
890 views

What does flying in Enceladus's plume accomplish?

I've been having a hard time understanding what flying through Enceladus's plume accomplishes. Cassini is an orbiter. It seems odd that it would have instruments that could even analyze the plume at ...
8
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3answers
1k views

How to find underground resources (water? caves?) on Mars?

On earth, there exists large amounts of water underground in aquifers. Curiosity has proven that water used to exist on the surface. If this is true, Mars still may have underground reservoirs of ...
2
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3answers
573 views

How is Martian water lost to space?

I have read this news article and I wonder how Mars water is lost to space. Mars has mass and hence it has also got gravity to pull objects towards it like the Earth does. So how can water be lost to ...
16
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1answer
5k views

Can you take a bath on Mars?

A common picture of someone floating on the Dead Sea or Great Salt Lake, shows how high you float. l If you had that water in a bath tub, I don't think you would sink to the bottom, you would just ...
14
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4answers
3k views

What about gathering water ice from Saturn's rings?

Saturn's rings are almost pure water ice in nice manageable chunks from specks to boulders a few meters across. Assuming there is something truly useful to do with it - once again talking about ...
5
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1answer
472 views

Lunar Module water supply

As weight was a problem from the beginning (launch) of an Apollo mission, was the LM water tank already filled, or were they filled during the trip to the moon from fuel-cell byproduct water?
5
votes
1answer
339 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. But the ...
4
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1answer
187 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 ...
4
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1answer
312 views

Could a bidet be used effectively in free fall?

An answer and a comment on a related question, got me wondering. What would happen if you tried to use a bidet to clean up after doing your business without gravity. Water does not behave in space ...
3
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2answers
156 views

Underground sea in Titan, is it water or hydrocarbons?

The truth is that I have read a lot and I have become confused, the underground sea that Titan has, is it water or hydrocarbons, is anyone certain?
3
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0answers
243 views

Could ice be used to create a habitat or space station?

Some discussion around the existing question What is the largest naturally occurring body that could be hollowed and safely lived in? has lead me to post this question. I think the solution revolves ...
2
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0answers
153 views

Could not silica aerogel dramatically increase the atmospheric pressure on Mars?

In the NASA article Want to Colonize Mars ? Aerogel Could Help a study about the potential of aerogel as a building material on Mars is reviewed. In an experiment 2-3 centimeters of silica aerogel ...
2
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1answer
165 views

Why only 100 days for VIPER to look for water in the lunar south pole region?

VIPER is a lunar rover by NASA that will be tasked with prospecting for lunar resources, especially water ice, in permanently shadowed areas in the lunar south pole region. It is meant to support the ...