Questions tagged [water]

Questions about research and use of water in space environment

Filter by
Sorted by
Tagged with
3
votes
2answers
147 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?
4
votes
3answers
205 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)...
18
votes
6answers
3k views

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 ...
1
vote
1answer
98 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 ...
4
votes
1answer
133 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
votes
1answer
102 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
votes
1answer
144 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 ...
1
vote
0answers
114 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 ...
5
votes
2answers
145 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 ...
0
votes
1answer
93 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
votes
0answers
116 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 ...
45
votes
6answers
8k 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 ...
13
votes
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 ?
9
votes
1answer
230 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 ...
3
votes
1answer
112 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
votes
1answer
204 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
votes
1answer
252 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 ...
1
vote
0answers
40 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
votes
2answers
102 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 ...
1
vote
1answer
602 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
votes
1answer
183 views

How to get water inside a space suit?

How is water transferred from outside the suit to inside the suit?
3
votes
1answer
118 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
votes
1answer
225 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
votes
2answers
316 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?
-4
votes
2answers
255 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
votes
1answer
266 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
votes
0answers
74 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 ...
1
vote
0answers
73 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
votes
1answer
119 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
votes
1answer
398 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
votes
4answers
490 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
votes
2answers
434 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 ...
8
votes
3answers
217 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 ...
7
votes
1answer
197 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 ...
4
votes
1answer
123 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 ...
22
votes
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 ...
5
votes
1answer
230 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 ...
7
votes
1answer
144 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 ...
4
votes
0answers
171 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 ...
11
votes
3answers
662 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
votes
1answer
159 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-...
4
votes
2answers
223 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 ...
1
vote
2answers
143 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 ...
134
votes
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 ...
2
votes
0answers
73 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 ...
10
votes
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 ...
5
votes
1answer
447 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?
4
votes
1answer
186 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 ...
2
votes
0answers
101 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 ...
3
votes
1answer
139 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 ...