Questions tagged [water]

Questions about research and use of water in space environment

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1answer
95 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 ...
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1answer
135 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 ...
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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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133 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
88 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 ...
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0answers
111 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
7k 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
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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 ?
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196 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 ...
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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 ...
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1answer
187 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. ...
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1answer
183 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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38 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?
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2answers
98 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
580 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 ...
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1answer
163 views

How to get water inside a space suit?

How is water transferred from outside the suit to inside the suit?
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1answer
114 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 ...
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1answer
215 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 ...
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310 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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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 ...
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1answer
250 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 ...
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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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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 ...
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1answer
118 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 ...
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388 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?
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4answers
458 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 ...
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2answers
383 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 ...
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206 views

How might water floating in space be 'mined'?

I feel like this is a bit of a dumb question, but I've been reading some articles about the giant body of water scientists have found floating in space (e.g. Enormous water reservoir found in space is ...
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191 views

Why is Enceladus the “most interesting place for astrobiology” in the Solar System other than Earth?

In season 1 episode 1 of Space's Deepest Secrets (IMDB), Dr. Chris McKay, a planetary scientist for NASA, says around 1h:40m into the show, "This is the single most important and interesting place for ...
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1answer
112 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 ...
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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 ...
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1answer
139 views

How much does pressure on Mars change with weather?

A great answer about the Mars atmosphere and water triple point shows there is a region on Mars where clean liquid water slightly above 0°C can exist on the surface. I still wonder, though, how ...
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169 views

Pool on the Moon?

Hypothetical scenario: There is a dome on the moon containing an Olympic-size swimming pool. Our intrepid hero is receiving a scuba diving lesson at the bottom of the pool (3m) when a hull breach ...
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3answers
630 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 ...
4
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1answer
126 views

Why are low-albedo asteroids thought to be more water-rich?

In this talk, J. L. Galache mentions that asteroid miners are looking for NEAs with: low delta-v (so the asteroid is easy to get to/from from Earth) low synodic period (for frequent launch/return-...
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2answers
221 views

How old is the underground lake on Enceladus?

They always talk about how there might be life on Enceladus, but how old is this lake really? I would imagine water being ejected from the moon is not a process that would last forever (because the ...
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139 views

Water supplies needed during travel to mars

Could architectures seeking human missions to Mars not put caches of water in orbit around Earth prior to launching of a manned mission? This would allow a later-launched manned mission to dock with ...
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5answers
33k 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 ...
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0answers
72 views

Mars drill depth to discover Life

Curiosity has shown that Mars used to have persistent liquid water on the surface. (~3+ billion years ago.) IF life was around at that time, at what depth would we expect to find it? Without plate ...
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4answers
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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 ...
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437 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?
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1answer
183 views

Is unpurified martian ice/water safe for irrigation?

There are large amounts of ice underground on mars. Some are closer to the surface then others. Assuming this ice has been mined and is not safe for human consumption without purification, is it ...
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100 views

Practical ice deposits on Mars?

Per JPL, Recent observations have discovered a resevoir of ice beneath the surface of mars. How practical, from an ISRU perspective, is this discovery? Frozen beneath a region of cracked and ...
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1answer
138 views

Liquid water on Mars

Scientists believe liquid water to be sporadically located near the equator of Mars. Is the water believed to be above-ground and if so do we know how deep? Or is it just within the soil near the ...
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2answers
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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 ...
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1answer
1k 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. ...
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1answer
171 views

How does Orion take its bath (Hydro Impact Basin)?

In 2011 the NASA Langley Research Center completed the Hydro Impact Basin for conducting drop tests of the Orion spacecraft. How much water is the basin filled with for these tests? Does the Orion ...
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4answers
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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 ...
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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 ...
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1answer
286 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 ...