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Questions tagged [water]

Questions about research and use of water in space environment

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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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199 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
195 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 ...
5
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1answer
101 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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1answer
162 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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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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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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3answers
182 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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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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102 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
119 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
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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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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
572 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
108 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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192 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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123 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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4answers
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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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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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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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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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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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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
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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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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
158 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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1answer
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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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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 ...
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Why doesn't this SpaceX rocket test fire use water sprays?

I know that rocket launches always have water towers spray water all around when the rocket is launching to suppress the extreme sounds and shockwaves generated by the launch and ensure the rocket ...
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1answer
718 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' ...
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1answer
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How plausible are the predictions made by Stephen Petranek at TED?

Here is the talk in question He talks about getting to Mars by 2027. He talks about a device called a WAVAR which will extract water from humidity. He also talks about a device called MOXIE which ...
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671 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 ...
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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 ...
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How likely is that Europa actually has no ice layer?

We have never landed on Europa, so the assumptions made on a possible ice layer on its surface are made on the data sent by various objects approaching it. I'm sure these assumptions were accurately ...
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1answer
342 views

What are the advantages of water-based sound suppression vs. cliff-based launching?

In this Q and A, it is explained that at Baikanour rocket launches are suspended over a cliff and vented instead of using a water-based sound suppression system as is commonly used. It would seem ...
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3answers
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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 ...
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1answer
151 views

How could you create water and air from materials in the Solar System?

If you don't have access to Earth(but still the moon) or the Sun, where could you obtain enough hydrogen, oxygen, and nitrogen to create enough water and an N2 and O2 atmosphere for, say a population ...
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Are the surfaces in permanent shadow in Moon craters 'fluffy'?

I was talking to someone who anticipated digging for water ice and other volatiles would be easy in these areas because Pete Schultz of the LCROSS science team described them as 'fluffy'. In this ...
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1answer
790 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. ...
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2answers
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How would one go about plumbing in a large space outpost?

Imagine a self-contained city in space with a usable surface area of $50 sq. km.$ (we're talking about the distant future, of course). Over 20,000 residents, industries like agriculture and fisheries, ...
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3answers
840 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 ...
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What is the science behind the canals of Mars?

A recent BBC news article give a short history on the canals of Mars In the late 19th Century, the American astronomer Percival Lowell thought he saw canals on the surface of Mars. He ...
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How does the presence of water on a planet indicate a likelihood of life?

As title says. We find water on a planet, and we assume that it's more likely life is there. How/why is this the case? Isn't it possible some life could survive without water? Even if the answer is '...
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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?
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Could it be possible to “steam” up water to orbit and collect it there?

Water is cheap and useful for many purposes in space (fuel, life support, radiation shielding and maybe even as the bulk part of construction material if covered from sublimation in vacuum). But ...