Questions tagged [water]

Questions about research and use of water in space environment

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10
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1answer
198 views

Feasibility of Liquid Water at Bottom of Valles Marieneris

Last night I was looking at NASA's equations for pressure and temperature of the atmosphere of Mars. P (in kiloPascals) = $0.699 \exp^{-0.00009 h}$ The Valles Marineris is 11 kilometers deep at it's ...
7
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5answers
977 views

Earth Launch System with Water Propellant

Water based thrusters have been proposed (and possibly tested by now) for use in satellites and other in-space vehicles - see this NASA article. The idea is to perform electrolysis on the water to ...
4
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1answer
83 views

Horseshoe lakes on Mars?

Have any horseshoe lakes been found on Mars? Or have there been other signs of rivers persisting long enough to form altered channels? For the purposes of this question, I would exclude multiple ...
2
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0answers
41 views

Scientific value of a local Martian weather experiment by uncovering the subsurface ice in Nier crater?

From NASA's Treasure Map for Water Ice on Mars: "You wouldn't need a backhoe to dig up this ice. You could use a shovel," said the paper's lead author, Sylvain Piqueux of NASA's Jet ...
1
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1answer
91 views

Pee processing in space

Do astronauts drink each their own pee or is there a common pee container where all pee get collected and processed? It's clear to me that the obtained water must be sterile, but even then, I imagine ...
3
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0answers
45 views

Can it be estimated when a first settlement near the equator would become more economical than one at the midlatitudes of Mars?

Choosing the right place on Mars for a settlement would be of course an important decision because once it's there it would take much time and money to move on to another, better location. Because the ...
2
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0answers
53 views

How is the presence of water detected on celestial bodies?

How is the presence of water detected on celestial bodies and how is its state, solid or liquid, determined? In a related question, are the same methods used to detect the presence of subsurface water,...
2
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0answers
43 views

Water Deluge and Flame Trenches [duplicate]

After years of seeing a water tower so close to the launch pad, I’m now just starting to realize it has a purpose. I was a fool to think the water tower had been there for years and they just could ...
9
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0answers
165 views

Why is the water pumped out of the holding tank a minute before Falcon 9 liftoff?

SpaceX Falcon 9 - starlink mission on October 5. Video : Why is the water discharged at T- 01m:30s from the holding tank far away from the launch pad? This was also ...
2
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1answer
209 views

What would be the required equipment for an astronaut to dig to the centre of Bennu?

Credits: NASA/Goddard/University of Arizona The image above is part of a close-up acquired by NASA's OSIRIS-REx spacecraft of Bennu's surface. 101955 Bennu is a carbonaceous asteroid that is currently ...
2
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2answers
209 views

Will mining water on Bennu not be more economical than collecting it near the south pole of the Moon?

Bennu is a carbonaceous asteroid that is currently accompanied by the OSIRIS-REx spacecraft that will take samples from it to return to Earth. Its diameter is 490 m. and it is slightly denser than ...
6
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1answer
77 views

How are the Archival Samples of water on the ISS handled?

This answer includes this schematic showing the overview of the water processing system on the ISS, found on page 341 (page 375 of the pdf) of The International Space Station - Operating an Outpost in ...
4
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2answers
246 views

Do the Russians use a water deluge system when launching their current rockets?

After a video by What About it discussing water deluge systems I got to thinking about it. I remember hearing that the Russians don't use water deluge systems. Not sure if these would be considered a ...
5
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1answer
268 views

Choosing a specific region to live on Mars, how important will the degree of dust there be, compared with the availability of water?

Credits: NASA/JPL-Caltech/ASU The map above shows underground water ice on Mars, it's from the article NASA's Treasure Map for Water Ice on Mars. The blue and purple represent water ice less than 30 ...
5
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1answer
109 views

Water ice as dummy/filler payload to orbit

When I'm rich, and my reusable orbital launch program is well under way, I will be performing many orbital test-launches and paid satellite deployments. Once I've knocked out the bugs and optimized my ...
3
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1answer
93 views

Would Earth without water look like Mars? [closed]

I was watching this slideshow of 4K images of the surface of Mars, and I noticed that the surface looked mostly smooth, with the most rugged features being crater impacts (sort of resembling an Earth ...
2
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1answer
74 views

Where exactly are those eight steep slopes on Mars revealing structures of buried ice?

Credit:NASA/JPL-Caltech/UA/USGS The image above is from Phys.org's article Steep slopes on Mars reveal structure of buried ice that I came upon by the link in a comment from @Mark Adler after his ...
13
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1answer
516 views

Why did Apollo 13 need to ration water?

Drinking water in the lunar module originated from four water tanks: two in the ascent stage and two in the descent stage. (Unlike the CSM, there were no fuel cells to make more water.) Section 7.2....
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2answers
159 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?
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3answers
266 views

Challenges to building a human habitat on Titan (Saturn's Moon)?

I have been studying Titan for a while, reading documents from Cassini and Huygens (probes). On Titan there is an atmosphere, layer of clouds, seas of hydrocarbons (fuel and plastic for many centuries)...
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6answers
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What does space have to do with providing “fresh water … without the need for aquifers or pipes?” as Steven Kwast suggested?

In this speech, retired U.S. Air Force General Steven Kwast (ostensibly fired for promoting a U.S. Space Force over objections from the outgoing Secretary of the Air Force) suggests the U.S. space ...
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1answer
113 views

Does the polygonal pattern on the floor of this “crater” on Mars mean that there's water ice below its surface?

This presentation of the Program of the Second MSL Landing Site Workshop shows an image of a "crater" near the equator that is 2.4 km wide and 750 meters deep ! On the Mars Image explorer you can ...
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1answer
167 views

How exactly is the balance of minerals handled on ISS with the use of reclaimed (demineralised) water for human consumption?

This question and answers to it contain wealth of information regarding recycling of ISS resources, and water is one of them. Water, recycled from water waste, atmosphere moisture and urine, is ...
2
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1answer
124 views

Is it possible to have a planet made entirely out of water? [closed]

Let's say we had a mechanism of adding unlimited amounts of water at a certain point in space. How much water could we add until the water molecules would turn into something else due to gravity? What ...
2
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1answer
166 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 ...
2
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0answers
158 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 ...
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2answers
171 views

How do you mine water on Mars?

Water is required for human explorers of Mars and it is also widely expected to be used to synthesize methane rocket fuel for the return trip (by combining the water with CO2 and energy to create ...
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1answer
96 views

How does water respond in 0g?

I'm imagining a small orb magnetically suspended inside a sphere of any paryicular size floating in 0g. What would happen if you rotated the orb at a high/varied velocity? And what if you change the ...
2
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0answers
121 views

What would happen in this cavern on the Moon?

Imagine a large cavern on the moon, around the theoretical size limit determined by Purdue university - about 1.5 kilometers high, and 5 kilometers across on the floor. This cavern is a kilometer or ...
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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 ...
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5answers
3k views

What is the difference between an astronaut in the ISS and a freediver in perfect neutral buoyancy?

For example, does the blood of the freediver accumulates in his/her head while being upside down, as it would on land, or not, as it would in microgravity environment ?
11
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1answer
421 views

How did the Apollo survival kit desalter work?

According to the Apollo Experience Report: Crew Provisions and Equipment Subsystem, NASA Tech Note D-6737, p. 29, the survival kit in the Apollo command module had a means to remove the salt from ...
4
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1answer
197 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 ...
5
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1answer
339 views

How radioactive might the Moon's surface water be? Could it be unsafe to drink?

NASA Chief Scientist Jim Greene asks: Can we go (to the Moon) and drink the water? The source of the water in this case would be ice deposits to be found in permanently shaded areas on the Moon. ...
12
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1answer
432 views

Are there any possible methods for keeping surface water on mars?

I've been reading this wikipedia article on terraforming mars. One of the major issues with terraforming mars is essential molecules and elements escaping the planet. There have been several ...
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0answers
43 views

Water for shielding during space travel [closed]

Use less water for shielding during space travel by transferring water to the side of the craft exposed to the solar radiation source?
5
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2answers
138 views

Capture protons from solar wind

Could it be possible ( using a reasonable amount of energy and ressources ) to capture protons from solar wind on (ex. the moon) in order to produce water for a long term self-sufficient mission. The ...
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1answer
1k views

How to drink water on Mars?

There are craters filled with water on Mars as shown below. If fresh water is found, how would astronauts drink the water? Can the Apollo a spacesuit food/drink port be used to equalize the pressure ...
3
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1answer
285 views

How to get water inside a space suit?

How is water transferred from outside the suit to inside the suit?
3
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1answer
119 views

What can cause grooves (stairs like) features on Mars's ground that is opposite to water flow direction?

Looking at an image taken by Mars Odyssey THEMIS (Thermal Emission Imaging System) camera of an unnamed crater in Aonia Terra region I noticed what looks like grooves or ridges that resemble a stair ...
5
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1answer
230 views

What kinds of instruments do you need to detect whether liquid water/ice is on a planet?

Somewhat of a two-part question. Firstly I'm interested to know if it is expected that a planet/asteroid has water/ice on it, what kinds of scientific instruments you need to identify the presence and ...
6
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2answers
335 views

Where on Mars did the largest river once flow?

It is generally accepted that once there was running water on the surface of Mars. Can it be determined from remote sensing data from space where the biggest, largest and longest ones were?
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2answers
289 views

More water in a crater on Mars than the quantity dumped by the river Nile into the Mediterranean sea in 45 years?

If this is true then the problem of a reliable source of water on Mars, that is available the entire year, is solved. Crater on Mars filled with permanent ice. (Source: ESA, Mars Express) The ...
4
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1answer
286 views

Could a ball of water stay in orbit?

Could a water bubble (spherical occlusion of water in air or vacuum) similar to the one in the picture below remain in Earth orbit without evaporating, dispersing, or disintegrating? Assume the orbit ...
3
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0answers
87 views

How many tons of water is needed to surround ISS's living modules, so the rate of radiation exposure will be the same as on the surface of Earth?

If I understand correctly, it wasn't done because it's very expensive ($ per lbs) and there are no launch systems powerful enough for that? Also, could you please provide formulas and calculations? I ...
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0answers
77 views

Would the atmosphere of Mars become less dusty if the ice deposit in Utopia Planitia could be uncovered?

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 80 ...
6
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1answer
127 views

Where is the “almost certain” water in these spectra from Chandrayaan 1's Moon Mineralogy Mapper?

The New York Times article Ice on the Surface of the Moon? Almost Certainly, New Research Shows talks about the recent paper published in PNAS Direct evidence of surface exposed water ice in the lunar ...
7
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1answer
434 views

Evidence of Water D/H Ratios of Kuiper Belt Comets

I was wondering, are the comets 67P/Churyumov-Gerasimenko and 103P/Hartley 2 the only Kuiper Belt comets to date that have their water D/H (deuterium-to-hydrogen) ratio measured?
5
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4answers
528 views

What is the most economical way to vaporize the CO₂ deposit near the south pole of Mars?

In April 2011 NASA announced that the Mars Reconnaissance Orbiter had found a large, buried deposit of frozen carbon dioxide at the planet's south pole. It has a volume of about 12,000 cubic ...
11
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2answers
558 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 ...