Mercury

Void · 2015-02-16 09:37:18

Just a continuation of extreme speculation.
Returning to your original solution of a dynamic sun blocker in front of the planet, then utilizing the magnetic field of the planet that I presume will be allowed to expand. The most valuable asset will be the ability of the magnetic field and surface materials to generate water, for as long as the solar wind and planet Mercury exist. That is at least a billion years.

For giggles however, I wonder about indeed digging the maximum allowable hole(s) at one or more poles. While the planet has a very thick rigid crust and no tectonic movements, I read that it would have Mercury quakes from the condition where the planet is shrinking as it cools.

The point being that if you wanted to continue to remove materials from the planet you would not want the average air pressure to become very high, considerably less than that of Mars. But there would have to be limits on how deep you could dig a hole at the poles. It is a silly notion I know, but you did speculate on mining the whole planet completely, I would think that for the purposes of having a very long term source of water, it would be better to dig holes at the poles, just maybe deep enough to support some higher atmospheric pressure within. And to provide materials to build that dynamic sun blocker.

For Mars, which has a similar gravity field:
http://en.wikipedia.org/wiki/Atmosphere_of_Mars

Structure[edit]
Pressure comparison

Where
Pressure

Olympus Mons summit
0.03 kilopascals (0.0044 psi)
Mars average
0.6 kilopascals (0.087 psi)
Hellas Planitia bottom
1.16 kilopascals (0.168 psi)
Armstrong limit
6.25 kilopascals (0.906 psi)
Mount Everest summit[11]
33.7 kilopascals (4.89 psi)
Earth sea level
101.3 kilopascals (14.69 psi)
Mars's atmosphere is composed of the following layers:
Lower atmosphere: A warm region affected by heat from airborne dust and from the ground.
Middle atmosphere: The region in which Mars's jetstream flows
Upper atmosphere, or thermosphere: A region with very high temperatures, caused by heating from the Sun. Atmospheric gases start to separate from each other at these altitudes, rather than forming the even mix found in the lower atmospheric layers.
Exosphere: Typically stated to start at 200 km (120 mi) and higher, this region is where the last wisps of atmosphere merge into the vacuum of space. There is no distinct boundary where the atmosphere ends; it just tapers away.
There is also a complicated ionosphere,[12] and a seasonal ozone layer over the south pole.[13]

If the whole of the planet had an

Exosphere: Typically stated to start at 200 km (120 mi) and higher, this region is where the last wisps of atmosphere merge into the vacuum of space. There is no distinct boundary where the atmosphere ends; it just tapers away.

It already has a temporary and I presume on the low end of pressure, Exosphere. If that were improved to be the highest level for an Exosphere. then the holes would need to be at least

200 km (120 mi)

deep to even think of supporting ice covered water pools.

That's pretty deep. But if it was like a strip mining operation, maybe. I simply don't know. But if you could do it then you would have a location more favorable to humans, with perhaps sufficient radiation protection (Along with the magnetic field?). And an atmosphere to do aerocapture of arriving spacecraft. And also most likely a natural collection point for water generated by the incorporation of solar wind into the magnetic field where it the Hydrogen would combine with Oxygen from rocks, or from the puddle of atmosphere you would have at the poles.

Tom Kalbfus · 2015-02-16 11:49:44

I think the obvious thing to make the Sun shade out of is Mercury itself. In the short term, as far as manned habitation is concerned, one can place mirrored sun shades on poles above Mercury's surface. Since most of the light gets reflected back into space, not much is absorbed and reradiated as heat, so the surface under does not become hot enough to melt lead. I would add that mercury has 28,880,441 sq miles (74,800,000 sq km) of surface area, so we would need to make 28,880,441 sq miles (74,800,000 sq km) or mirrored surface, and we can do that on the night side of the planet where machines can operate better, set up the mirrors and move against the rotation of the planet so as to stay on the night side. Do this long enough and you can completely cover the planet with reflective mirrors. The planet is mostly made of iron, so there is plenty of metal for making mirrors out of.

Mars_B4_Moon · 2023-03-22 06:21:01

The ESA/NASA ESASolarOrbiter captured Mercury's silhouette against some towering gaseous structures in the Sun’s outer atmosphere

https://twitter.com/esa/status/1629526645118828546

Ben Bova, science fiction writer, I read died from Corona virus

https://www.youtube.com/watch?v=vroz5-qTgrQ

Last edited by Mars_B4_Moon (2023-03-22 06:23:02)

Mars_B4_Moon · 2023-05-18 06:53:31

Thermal expansion of oldhamite, CaS: Implication for the surface of Mercury

https://www.sciencedirect.com/science/a … 3523002063

Mars_B4_Moon · 2023-06-18 15:03:29

BepiColombo braces for third Mercury flyby

https://phys.org/news/2023-06-bepicolom … flyby.html

Calliban · 2023-10-27 00:56:33

Mercury appears to be volatile rich.
https://m.youtube.com/watch?v=DAI0EVQKp44

Who would have thought?

Void · 2023-10-27 08:59:32

It is very interesting.

I found the mention that Mercury may have formed further out in the solar system to be a very new claim.

I have recently read that there is some suspicion that Mercury was habitable at some point. That it was wet, and that underground the conditions would have been supportive of life.

All of this is of course new thinking to me.

Mercury of course becomes more interesting because of all of this and the coincidence, that it's gravity is very similar to that of Mars.

A thing that seems to be emerging about terrestrial worlds is very deep water, at least for Eart, but now Mercury might have it as well. And for Venus, I think I have read that the Hydrogen in the atmosphere has to be being replenished from somewhere. So, maybe very deep water for Venus as well.

Mars is not defined about that, and the Moon, is presumed dry, but I have seen some speculation on deep water for the Moon.

The means of travel Earth/Moon<>Mercury which has been forming in my mind has included very large cycling spaceships, with both nuclear and solar power methods, and likely also electric rocket methods.

Mercury and Earth seem to have a 1 to .24 time period of orbiting the sun. So, almost 4 orbits of Mercury for 1 of Earth. But these could be very active cyclers, using the solar wind to match phase to the planets. But I am not sure.

Smaller Sub-Cyclers could connect up to these during passage around the sun. These also could have nuclear and solar propulsive methods. Thess also could do a ballistic capture to Earth if desired, on occasion.

As far as transfer to Mercury, I am thinking that they could match up to Mercury's "L1" or "L2".

Then ships would connect from Mercury to stations in Mercury's "L1" or "L2".

But I have not done proper rocket science for this. It is more wishful thinking than proper science.

But, if Mercury is endowed with all these materials, then could be minded for various materials and those could travel outward to other worlds, using the solar photon method or solar wind method, or of course electric rocket methods.

Done

Last edited by Void (2023-10-27 09:23:25)

Void · 2023-11-18 14:07:37

I am very tired from a workout at the gym, so I have not energy to do anything other than to post at this time. I like the conversation in this article: https://phys.org/news/2023-11-unveiling … -salt.html
Quote:

NOVEMBER 17, 2023
Editors' notes
Unveiling Mercury's geological mysteries: Salt glaciers, primordial atmosphere, and the new frontiers of astrobiology
by Alan Fischer, Planetary Science Institute

I especially like this text, Quote:

"These findings challenge prevailing theories of VRL formation that traditionally centered on mantle differentiation processes, where minerals separate into different layers within the planet's interior. Instead, the evidence suggests a grand-scale structure, possibly stemming from the collapse of a fleeting, hot primordial atmosphere early in Mercury's history. This atmospheric collapse might have occurred mostly during the extended nighttime periods when the planet's surface was not exposed to the sun's intense heat."
"Underwater deposition could have significantly contributed to the emplacement of a salt dominated Mercurian VRL, marking a significant departure from previous theories about the planet's early geological history. In this scenario, water released through volcanic degassing may have temporarily created pools or shallow seas of liquid or supercritical water (like a dense, highly salty steam), allowing salt deposits to settle."
"Subsequent rapid loss of water into space and trapping of water in hydrated minerals in the crust would have left behind a salt- and clay mineral-dominated layer, which progressively built up into thick deposits," co-author Kargel said.

If that turns out to be true, then the habitability of Mercury would be greatly enhances, I think.

Images: https://www.bing.com/images/search?q=Ha … 177&ch=510

https://onejive.com/one-beautiful-salt-mines-world/
Image Quote:

We might want to find salt deposits on Mars also.

Done

Last edited by Void (2023-11-18 14:15:25)

Void · 2023-11-19 09:19:27

Running with this again: https://phys.org/news/2023-11-unveiling … -salt.html
Quote:

"These findings challenge prevailing theories of VRL formation that traditionally centered on mantle differentiation processes, where minerals separate into different layers within the planet's interior. Instead, the evidence suggests a grand-scale structure, possibly stemming from the collapse of a fleeting, hot primordial atmosphere early in Mercury's history. This atmospheric collapse might have occurred mostly during the extended nighttime periods when the planet's surface was not exposed to the sun's intense heat."
"Underwater deposition could have significantly contributed to the emplacement of a salt-dominated Mercurian VRL, marking a significant departure from previous theories about the planet's early geological history. In this scenario, water released through volcanic degassing may have temporarily created pools or shallow seas of liquid or supercritical water (like a dense, highly salty steam), allowing salt deposits to settle."
"Subsequent rapid loss of water into space and trapping of water in hydrated minerals in the crust would have left behind a salt- and clay mineral-dominated layer, which progressively built up into thick deposits," co-author Kargel said.

And my hope would be that Nitrogen may be included in those "hydrated minerals in the crust would have left behind a salt- and clay mineral-dominated layer" materials.

For the Moon, it is actually thought that there is enough Nitrogen in the regolith for agriculture. It would have to be extracted however.
Mercury may also have this, but I am hoping that like Ceres it might have enough for a civilization on Mercury.

And this: (My mind struggles): https://iopscience.iop.org/article/10.3847/PSJ/acf219

Well, if this stuff proves true then Mercury does hold a lot of promise as a place that could be very useful to humans and robots in a solar "Civilization".

Calliban had a nice post a while back: http://newmars.com/forums/viewtopic.php … 42#p215242
It seems that the atmosphere of Mercury has Oxygen and Hydrogen which if collected might make water. Of course it is extremely thin.

But if you made a cold spot as cold as the polar shaded craters, and used electrostatic force you might accumulate both and maybe get water ice anywhere on the surface of Mercury, I think. Probably a capacitor with a plate on the bottom with a (-) charge, with the electrons looted from Mercury itself, and then an electrical insulating layer, and then an open plate on the top that (+) ions could plate onto. Cool that in the shade, to very low temperatures and you might accumulate water, I think.

It seems possible that water is leaking out of Mercury though, and maybe wells could be drilled. And then there are ice sheets at the poles.
https://en.wikipedia.org/wiki/Mercury_( … 0sheet.%20
Quote:

At Mercury's poles there are large reservoirs of water ices that are never exposed to direct sunlight, which has an estimated mass of about 0.025–0.25% the Antarctic ice sheet.

Query: "Colonizing Mercury"
General Response: https://www.bing.com/search?q=Colonizin … ADA9D8DD97

Isaac Arthur Video: https://www.bing.com/videos/riverview/r … &FORM=VIRE

More Video: https://www.bing.com/videos/search?q=Co … ORM=HDRSC4

Getting to Mercury would be a problem, but I have considered 'cyclers to get you inside the orbit of Mercury, and then a ship that uses some kind of solar sailing to move from that to Mercury or a L1 or L2 of Mercury.

Mostly you would only be moving humans, not materials in that manner.

But you would have to get some infrastructure started there at first of course.

If you could eject your solar sailing ship from the cycler very near the sun, then it would have a lot of power to get to Mercury's orbit(s).

The solar sailing ship could then fly by automation to be required by the cycler over time.

To get humans to the cycler, you probably want nuclear thermal propulsion.

It is an attempt anyway. Of course the sailing ship really needs thermal protections and radiation protections.

Done

Last edited by Void (2023-11-19 09:55:22)

Mars_B4_Moon · 2023-11-23 09:20:50

Mercury is home to exotic glaciers of salt, and they may host life beneath them

https://www.space.com/mercury-salt-glac … bitability

Void · 2023-12-01 08:05:49

The Angry Astronaut talks about Mercury and life: https://www.reddit.com/r/TheAngryAstron … can_exist/
Quote:

r/TheAngryAstronaut icon
Go to TheAngryAstronaut
r/TheAngryAstronaut
•
17 hr. ago
TheAngryAstronaut
We were wrong about Mercury!! If life can exist here, it can exist anywhere!!

Done

Last edited by Void (2023-12-01 08:06:41)

Mars_B4_Moon · 2023-12-13 09:23:16

Do Glaciers on Mercury Suggest Such a Planet Could Be Habitable?

https://skyandtelescope.org/astronomy-n … habitable/

Void wrote:

TheAngryAstronaut

Social media like you tube and reddit have censored a lot these past years, same channel mirrored and backed up?

You might have to copy and paste with that @ symbol in the url

https://odysee.com/@TheAngryAstronaut:a

Last edited by Mars_B4_Moon (2023-12-13 09:23:31)

Mars_B4_Moon · 2024-04-12 10:53:47

'How can one terraform Mercury?'

https://space.stackexchange.com/questio … rm-mercury

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#26 2015-02-16 09:37:18

Re: Mercury

#27 2015-02-16 11:49:44

Re: Mercury

#28 2023-03-22 06:21:01

Re: Mercury

#29 2023-05-18 06:53:31

Re: Mercury

#30 2023-06-18 15:03:29

Re: Mercury

#31 2023-10-27 00:56:33

Re: Mercury

#32 2023-10-27 08:59:32

Re: Mercury

#33 2023-11-18 14:07:37

Re: Mercury

#34 2023-11-19 09:19:27

Re: Mercury

#35 2023-11-23 09:20:50

Re: Mercury

#36 2023-12-01 08:05:49

Re: Mercury

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Re: Mercury

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