Ceres - Revision history

Apm: /* External links */ added links to NASA pages

2021-06-18T16:24:09Z

External links: added links to NASA pages

← Older revision		Revision as of 18:24, 18 June 2021
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	* [https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities] (To see what humans can deal with – 5000m is certainly not healthy)		* [https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities] (To see what humans can deal with – 5000m is certainly not healthy)
			----
			'''Awesome picture of a cryovolcanic vent:'''
			* https://solarsystem.nasa.gov/resources/1530/dawn-takes-a-closer-look-at-occator/
			* https://photojournal.jpl.nasa.gov/catalog/PIA19889
			----
			* [https://solarsystem.nasa.gov/missions/dawn/overview/ NASA Dawn mission page (the probe that visited Ceres)]

Apm: /* External links */ added three links

2021-06-18T13:49:03Z

External links: added three links

← Older revision		Revision as of 15:49, 18 June 2021
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	= External links =		= External links =

			* [https://en.wikipedia.org/wiki/Ceres_(dwarf_planet) Ceres_(dwarf_planet)]
			* [https://en.wikipedia.org/wiki/Earth%27s_crust Earth's crust] (upper crust range between 2.69 and 2.74 g/ccm and for lower crust between 3.0 and 3.25 g/ccm)
			* [https://en.wikipedia.org/wiki/List_of_natural_satellites List_of_natural_satellites] Ceres (not a sattelite) is similar in size (slightly smaller than) Saturns moon Tethys

	* [https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities] (To see what humans can deal with – 5000m is certainly not healthy)		* [https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities] (To see what humans can deal with – 5000m is certainly not healthy)

Apm: /* Related / added Titan (giant moon) * Colonization of the solar system

2021-06-18T12:46:38Z

← Older revision		Revision as of 14:46, 18 June 2021
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	= Related =		= Related =

			* [[Colonization of the solar system]]
	* [[Cryovolcanism]]		* [[Cryovolcanism]]
			* [[Titan (giant moon)]] – Another volatile rich candidate for colonization with high potential (albeit way farther out the solar system at [[Saturn]])

	= External links =		= External links =

	* [https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities] (To see what humans can deal with – 5000m is certainly not healthy)		* [https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities] (To see what humans can deal with – 5000m is certainly not healthy)

Apm: /* External links */

2021-06-18T12:44:31Z

External links

← Older revision		Revision as of 14:44, 18 June 2021
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	= External links =		= External links =

	* [[https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities]] (To see what humans can deal with – 5000m is certainly not healthy)		* [https://en.wikipedia.org/wiki/List_of_highest_cities List of highest cities] (To see what humans can deal with – 5000m is certainly not healthy)

Apm: /* Synthesis of Air */

2021-06-18T12:44:06Z

Synthesis of Air

← Older revision		Revision as of 14:44, 18 June 2021
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	Oxygen is easy: Direct synthesis from water. <br>		Oxygen is easy: Direct synthesis from water. <br>
	Nitrogen may be a bit more ~~trickey~~: <br>		Nitrogen may be a bit more tricky: <br>
	To make nitrogen there's a need to find some ammoniak ice (or other easily processable nitrogen rich compounds). <br>		To make nitrogen there's a need to find some ammoniak ice (or other easily processable nitrogen rich compounds). <br>
	Amonniak is even more volative than water. <br>		Amonniak is even more volative than water. <br>

Apm: added = Synthesis of Air =

2021-06-18T12:43:39Z

added = Synthesis of Air =

← Older revision		Revision as of 14:43, 18 June 2021
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	* (2) would make exploration much easier		* (2) would make exploration much easier

	== Colonization of Ceres ==		= Colonization of Ceres =

	Unlike on our moon there are plenty of volatile elements as raw materials available. <br>		Unlike on our moon there are plenty of volatile elements as raw materials available. <br>
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	Gravitative differentiation also may have concentrated the lighter less dense more volatile elements on the outer parts of the planets volume.		Gravitative differentiation also may have concentrated the lighter less dense more volatile elements on the outer parts of the planets volume.

	=~~= Gravity and mining =~~=		= Underground ambient pressure unpressurized bases for human activities =

	Wikipedia lists:		Wikipedia lists:
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	* (model dependent) core density 2.46 to 2.9 g/cm<sup>3</sup>		* (model dependent) core density 2.46 to 2.9 g/cm<sup>3</sup>

	=== The one Earth atmosphere pressure depth level ===		== The one Earth atmosphere pressure depth level ==

	At the right depth level in Ceres' crust the water of cryo-volcanic (or artificuially molten) channels		At the right depth level in Ceres' crust the water of cryo-volcanic (or artificuially molten) channels
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	So what is the depth ''range'' that would be nice for human physiology?		So what is the depth ''range'' that would be nice for human physiology?

	=== The human physiology depth range ===		== The human physiology depth range ==

	Earth at 5000m ~0.5bar is pretty much the lower limit that humans can endure over extended periods of time (not healthy though). <br>		Earth at 5000m ~0.5bar is pretty much the lower limit that humans can endure over extended periods of time (not healthy though). <br>
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	At least a slight crust must be there though since liquid water cannot exist in vacuum.		At least a slight crust must be there though since liquid water cannot exist in vacuum.

	=== The unpressurized briefly visitable deph range ===		== The unpressurized briefly visitable deph range ==

	More extreme depths borderline acceptable for brief visits: <br>		More extreme depths borderline acceptable for brief visits: <br>
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	700m * 34.5 = 24.15km (or 12.075km)		700m * 34.5 = 24.15km (or 12.075km)

	=== How deep could we mine on Ceres? ===		= Synthesis of Air =

			Oxygen is easy: Direct synthesis from water. <br>
			Nitrogen may be a bit more trickey: <br>
			To make nitrogen there's a need to find some ammoniak ice (or other easily processable nitrogen rich compounds). <br>
			Amonniak is even more volative than water. <br>
			It will be interesting to see if and where it will be found. <br>
			Molecular nitrogen is only retained at bodies way out the solar system (Titan, Triton, Pluto, TNOs, ...)

			= Very deep mining made possible by Ceres' very low gravity =

			== How deep could we mine on Ceres? ==

	Earth's deepest mine (a gold mine) is about 4000m=4km deep. <br>		Earth's deepest mine (a gold mine) is about 4000m=4km deep. <br>
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	* Glacial flow of material might be a big challenge (allowing for much less deep mining)		* Glacial flow of material might be a big challenge (allowing for much less deep mining)

	=== Creation and maintenance of artificial underground tunnel channels ===		== Creation and maintenance of artificial underground tunnel channels ==

	The material being quite water ice rich may be quite soft and rater easy to dig through. <br>		The material being quite water ice rich may be quite soft and rater easy to dig through. <br>
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	So glacial shearing flows may be rather limited which would be beneficial.		So glacial shearing flows may be rather limited which would be beneficial.

	=== How deep could we drill into Ceres ===		== How deep could we drill into Ceres (the center?) ==

	On Earth the record was near 14km. <br>		On Earth the record was near 14km. <br>

Apm: /* The one Earth atmosphere pressure depth level */ added note on filling artificial channels with air to prevent re-freezing

2021-06-18T12:23:10Z

The one Earth atmosphere pressure depth level: added note on filling artificial channels with air to prevent re-freezing

← Older revision		Revision as of 14:23, 18 June 2021
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	=== The one Earth atmosphere pressure depth level ===		=== The one Earth atmosphere pressure depth level ===

	At the right depth level in Ceres' crust the water of ~~cryovolcanic~~ (or artificuially molten) channels could		At the right depth level in Ceres' crust the water of cryo-volcanic (or artificuially molten) channels
	~~take~~ the pressurizing function that on Earth is fulfilled by air.		could fulfill the pressurizing function that on Earth is fulfilled by air.
	That is an underground base at the right depth would need no airlock.		That is an underground base at the right depth would need no airlock.
	A down facing port into a ~~cryovolcanic~~ (or ~~artificuially~~ molten) channel can suffice		A down facing port into a cryo-volcanic (or artificially molten) channel can suffice.
	(a door against excessive air humidity and eventually unpleasant toxic gasses filling the whole station may still be advisable).		A door against excessive air humidity and eventually unpleasant toxic gasses filling the whole station may still be advisable though.
	This is very much NOT like a submarine since the pressure of the water outside and the air inside are equally 1bar.		This is very much NOT like a submarine since the pressure of the water outside and the air inside are equally 1bar.
	So there is no need for thick sturdy and heavy submarine like walls resisting an implosion.		So there is no need for thick sturdy and heavy submarine like walls resisting an implosion.

	Ice diving in very cold ~~briney~~ water with earth ice diving dry-suite equipment might be borderline possible. <br>		Ice diving in very cold briny water with earth ice diving dry-suite equipment might be borderline possible. <vr>
	But likely not a good idea though. (This calls for ~~specialised~~ suites: [[~~gem~~-gum suit]]s)		But likely not a good idea though. This calls for specialized suites that remove any and all discomfort from ice diving. <br>
			See: [[Gem-gum suit]]s.

			Artificial channels far from natural cryo-volcanic channels likely need to be filled <br>
			with synthesized air (of the same pressure as the surrounding ice-rock) to prevent re-freezing and collapse. <br>
			No need for ice diving in these channels

	It's exactly 1bar only for exactly one depth though. <br>		It's exactly 1bar only for exactly one depth though. <br>

Apm: /* Colonization of Ceres */

2021-06-18T12:13:36Z

Colonization of Ceres

← Older revision		Revision as of 14:13, 18 June 2021
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	Small asteroids of the main belt are the same distance from the sun as Ceres but <br>		Small asteroids of the main belt are the same distance from the sun as Ceres but <br>
	they may have a harder time to hang on to their volatiles due to their lower gravity and smaller diameter. <br>		they may have a harder time to hang on to their volatiles due to their lower gravity and smaller diameter. <br>
	---		----
	Directly exposed water ice in space (when not really far from the sun) sublimates and gets blown away by the solar wind. <br>		Directly exposed water ice in space (when not really far from the sun) sublimates and gets blown away by the solar wind. <br>
	Maybe volatile ices can be found right under a very thin more silicatic regolith dust cover from asteroid impacts though. <br>		Maybe volatile ices can be found right under a very thin more silicatic regolith dust cover from asteroid impacts though. <br>

Apm: /* Colonization of Ceres */

2021-06-18T12:13:28Z

Colonization of Ceres

← Older revision		Revision as of 14:13, 18 June 2021
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	Small asteroids of the main belt are the same distance from the sun as Ceres but <br>		Small asteroids of the main belt are the same distance from the sun as Ceres but <br>
	they may have a harder time to hang on to their volatiles due to their lower gravity and smaller diameter. <br>		they may have a harder time to hang on to their volatiles due to their lower gravity and smaller diameter. <br>
	Maybe volatile ices ~~are~~ right under a very thin more silicatic regolith dust cover from asteroid impacts though. <br>		---
	We've seen that on the (closer to the sun) Mars but there a somewhat notable atmosphere ~~and way higher gravity~~ is present. <br>		Directly exposed water ice in space (when not really far from the sun) sublimates and gets blown away by the solar wind. <br>
	Gravitative differentiation also may have concentrated the lighter less dense more volatile elements on the outer parts of the ~~planet~~.		Maybe volatile ices can be found right under a very thin more silicatic regolith dust cover from asteroid impacts though. <br>
			We've seen that on the (even closer to the sun) Mars but there way higher gravity (and a somewhat notable atmosphere) is present. <br>
			Gravitative differentiation also may have concentrated the lighter less dense more volatile elements on the outer parts of the planets volume.

	== Gravity and mining ==		== Gravity and mining ==

Apm: /* Colonization of Ceres */

2021-06-18T12:07:55Z

Colonization of Ceres

← Older revision		Revision as of 14:07, 18 June 2021
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	Unlike on our moon there are plenty of volatile elements as raw materials available. <br>		Unlike on our moon there are plenty of volatile elements as raw materials available. <br>
	Don't be fooled by the grey cratered similar appearance. Ceres is very very different from our moon. <br>		Don't be fooled by the grey cratered similar appearance. <br>
			Ceres is very very different from our moon. <br>
	Small asteroids of the main belt are the same distance from the sun as Ceres but <br>		Small asteroids of the main belt are the same distance from the sun as Ceres but <br>
	they may have a harder time to hang on to their volatiles due to their lower gravity and smaller diameter. <br>		they may have a harder time to hang on to their volatiles due to their lower gravity and smaller diameter. <br>

Ceres - Revision history

Apm: /* External links */ added links to NASA pages

Apm: /* External links */ added three links

Apm: /* Related */ added * Titan (giant moon) * Colonization of the solar system

Apm: /* External links */

Apm: /* Synthesis of Air */

Apm: added = Synthesis of Air =

Apm: /* The one Earth atmosphere pressure depth level */ added note on filling artificial channels with air to prevent re-freezing

Apm: /* Colonization of Ceres */

Apm: /* Colonization of Ceres */

Apm: /* Colonization of Ceres */

Apm: /* Related / added Titan (giant moon) * Colonization of the solar system