Paraterraforming - Revision history

Michel Lamontagne at 13:13, 4 June 2021

2021-06-04T13:13:40Z

← Older revision		Revision as of 14:13, 4 June 2021
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	Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet-covering dome, a thick atmosphere can exist.		Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet-covering dome, a thick atmosphere can exist.

	== Shell worlds ==		==Shell worlds==
	[[File:Shell1.jpg\|frame\|Anchored pressure structure]]		[[File:Shell1.jpg\|frame\|Anchored pressure structure]]
	[[File:Shell2.png\|frame\|Large scale anchored pressure structure]]		[[File:Shell2.png\|frame\|Large scale anchored pressure structure. The low pressure structure allows for the existence of the lake and eventually surface life forms. The structure covers a smaller Earth pressure habitat seen in the foreground.\|alt=]]
	Eventually, a group of domes could grow into a shell world. As the domes become larger, their unit mass becomes heavier. Very large domes will eventually reach a unit mass such that the downwards force from the mass is equal to the force from the internal pressure. In such a case the structural tension disappears, except around the edges, and there is no fixed limit to the size of the dome. A planetary body entirely enclosed in such a structure is a Shell World<ref>Shell Worlds: Roy, Kenneth I., Robert G. Kennedy III, and David E. Fields. "Shell worlds." ''Acta Astronautica'' 82.2 (2013): 238-245.</ref>.		Eventually, a group of domes could grow into a shell world. As the domes become larger, their unit mass becomes heavier. Very large domes will eventually reach a unit mass such that the downwards force from the mass is equal to the force from the internal pressure. In such a case the structural tension disappears, except around the edges, and there is no fixed limit to the size of the dome. A planetary body entirely enclosed in such a structure is a Shell World<ref>Shell Worlds: Roy, Kenneth I., Robert G. Kennedy III, and David E. Fields. "Shell worlds." ''Acta Astronautica'' 82.2 (2013): 238-245.</ref>.

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	==Biography==		==Biography==
	"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.		"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.
			<references />

Michel Lamontagne at 13:10, 4 June 2021

2021-06-04T13:10:10Z

← Older revision		Revision as of 14:10, 4 June 2021
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	Paraterraforming (or World House Design) is a subset of [[Terraforming]] where it takes place inside huge structures which may cover a large fraction of a world's surface. A key advantage is that the economic benefits of terraforming can be enjoyed much more quickly.		Paraterraforming (or World House Design) is a subset of [[Terraforming]] where it takes place inside huge structures which may cover a large fraction of a world's surface. A key advantage is that the economic benefits of terraforming can be enjoyed much more quickly.
			___NOTOC___
	==Introduction==		==Introduction==
	Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the center of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.		Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the center of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.

Michel Lamontagne at 13:09, 4 June 2021

2021-06-04T13:09:50Z

← Older revision		Revision as of 14:09, 4 June 2021
Line 1:		Line 1:
	Paraterraforming (or World House Design) is a subset of [[Terraforming]] where it takes place inside huge structures which may cover a large fraction of a world's surface. A key advantage is that the economic benefits of terraforming can be enjoyed much more quickly.		Paraterraforming (or World House Design) is a subset of [[Terraforming]] where it takes place inside huge structures which may cover a large fraction of a world's surface. A key advantage is that the economic benefits of terraforming can be enjoyed much more quickly.

	==Introduction:==		==Introduction==
	Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the ~~centre~~ of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.		Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the center of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.

	Note that anchoring a large pressure dome to the ground is challenging engineering. A tremendous amount of pressure is pushing upwards, so the dome, unless held down with huge force will blast away from the ground. Rather than having a full atmosphere of pressure, a lower pressure, oxygen rich atmospheres will likely be chosen. (For example, an atmosphere of 0.2 bar of oxygen, and 0.1 bar of nitrogen is breathable, but only would have 30% of the upward force on a large dome.)		Note that anchoring a large pressure dome to the ground is challenging engineering. A tremendous amount of pressure is pushing upwards, so the dome, unless held down with huge force will blast away from the ground. Rather than having a full atmosphere of pressure, a lower pressure, oxygen rich atmospheres will likely be chosen. (For example, an atmosphere of 0.2 bar of oxygen, and 0.1 bar of nitrogen is breathable, but only would have 30% of the upward force on a large dome.)
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	Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet-covering dome, a thick atmosphere can exist.		Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet-covering dome, a thick atmosphere can exist.

	== Synergies ==		== Shell worlds ==
			[[File:Shell1.jpg\|frame\|Anchored pressure structure]]
			[[File:Shell2.png\|frame\|Large scale anchored pressure structure]]
			Eventually, a group of domes could grow into a shell world. As the domes become larger, their unit mass becomes heavier. Very large domes will eventually reach a unit mass such that the downwards force from the mass is equal to the force from the internal pressure. In such a case the structural tension disappears, except around the edges, and there is no fixed limit to the size of the dome. A planetary body entirely enclosed in such a structure is a Shell World<ref>Shell Worlds: Roy, Kenneth I., Robert G. Kennedy III, and David E. Fields. "Shell worlds." ''Acta Astronautica'' 82.2 (2013): 238-245.</ref>.

			==Synergies==
	Note that Paraterraforming and Terraforming can work together, making each other easier. If we increased the Martian air pressure to 10% that of Earth, we wouldn't need pressure suits to go outside (just breathing masks). However, this increase in air pressure makes it easier & cheaper to build large pressure structures with breathable atmospheres inside.		Note that Paraterraforming and Terraforming can work together, making each other easier. If we increased the Martian air pressure to 10% that of Earth, we wouldn't need pressure suits to go outside (just breathing masks). However, this increase in air pressure makes it easier & cheaper to build large pressure structures with breathable atmospheres inside.

	==Biography:==		==Biography==
	"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.		"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.

RichardWSmith: Added Synergies section, and some other small additions.

2021-06-04T03:04:37Z

Added Synergies section, and some other small additions.

← Older revision		Revision as of 04:04, 4 June 2021
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	==Introduction:==		==Introduction:==
	Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the centre of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.		Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the centre of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.

			Note that anchoring a large pressure dome to the ground is challenging engineering. A tremendous amount of pressure is pushing upwards, so the dome, unless held down with huge force will blast away from the ground. Rather than having a full atmosphere of pressure, a lower pressure, oxygen rich atmospheres will likely be chosen. (For example, an atmosphere of 0.2 bar of oxygen, and 0.1 bar of nitrogen is breathable, but only would have 30% of the upward force on a large dome.)

	Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet-covering dome, a thick atmosphere can exist.		Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet-covering dome, a thick atmosphere can exist.

			== Synergies ==
			Note that Paraterraforming and Terraforming can work together, making each other easier. If we increased the Martian air pressure to 10% that of Earth, we wouldn't need pressure suits to go outside (just breathing masks). However, this increase in air pressure makes it easier & cheaper to build large pressure structures with breathable atmospheres inside.

	==Biography:==		==Biography:==
	"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.		"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.

RichardWSmith: /* Introduction: */

2021-03-12T17:11:15Z

Introduction:

← Older revision		Revision as of 18:11, 12 March 2021
Line 1:		Line 1:
	Paraterraforming (or World House Design) is a subset of [[Terraforming]] where it takes place inside huge structures which may cover a large fraction of a world's surface. A key advantage is that the economic benefits of terraforming can be enjoyed much more quickly.		Paraterraforming (or World House Design) is a subset of [[Terraforming]] where it takes place inside huge structures which may cover a large fraction of a world's surface. A key advantage is that the economic benefits of terraforming can be enjoyed much more quickly.

	== Introduction: ==		==Introduction:==
	Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the centre of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.		Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the centre of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.

	Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet covering dome, a thick atmosphere can exist.		Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet-covering dome, a thick atmosphere can exist.

	== Biography: ==		==Biography:==
	"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.		"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.

RichardWSmith: Placeholder page to get things started.

2021-03-12T17:10:05Z

Placeholder page to get things started.

New page

Paraterraforming (or World House Design) is a subset of [[Terraforming]] where it takes place inside huge structures which may cover a large fraction of a world's surface. A key advantage is that the economic benefits of terraforming can be enjoyed much more quickly.

== Introduction: ==
Many people are concerned about long term [[Atmospheric loss]] on Mars, and by building huge structures this can be completely avoided. A large crater (say 10 km across), could have a 'tent pole' placed in the centre of it, and then a transparent material could drape from the tent pole to the crater rim. Under this tent, atmospheric pressure could be increased, and it could be given a breathable atmosphere. Over time, more and more larger craters can be so engineered, until a significant fraction of the world is habitable. At this time, you could say that Mars has been Paraterraformed.

Asteroids are far too small to have an atmosphere, but are close enough to Sol to allow the growing of crops. Let us say that we surrounded Ceres with a rigid, self-sealing, transparent dome. Everywhere the 'glass sky' would be a couple km above the surface. Under this planet covering dome, a thick atmosphere can exist.

== Biography: ==
"Terraforming: Engineering Planetary Environments", Martin J. Fogg, ISBN: 1-56091-609-5. See chapter 8.2 for a discussion of this concept.