Low gravity - Revision history

RichardWSmith: /* Martian gravity in fiction */

2026-01-22T22:16:10Z

Martian gravity in fiction

← Older revision		Revision as of 23:16, 22 January 2026
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	==Martian gravity in fiction==		==Martian gravity in fiction==
			Edgar Rice Burroughs wrote an 11 book series about John Carter who was teleported to Mars. On Mars the low gravity allowed him to leap 50 feet at a time (too far to be realistic), and compared to the natives, he had super human strength.

	==Increasing Gravity Inside Long Term Mars Habitations==		==Increasing Gravity Inside Long Term Mars Habitations==

RichardWSmith: updated date.

2026-01-22T22:12:44Z

updated date.

← Older revision		Revision as of 23:12, 22 January 2026
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	==Long term medical effects of 38% gravity==		==Long term medical effects of 38% gravity==
	As of ~~2024~~, no studies have researched this question. Once we have real data, please update this section. This should be a focus of [[Future research]].		As of 2026, no studies have researched this question. Once we have real data, please update this section. This should be a focus of [[Future research]].

	==Short term medical effects of 38% gravity==		==Short term medical effects of 38% gravity==

RichardWSmith: Use less jargon

2024-10-22T19:30:08Z

Use less jargon

← Older revision		Revision as of 20:30, 22 October 2024
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	(Note the acceleration only needs to be ~62% of Earth's gravity because we will add Mars' current gravity to this acceleration.)		(Note the acceleration only needs to be ~62% of Earth's gravity because we will add Mars' current gravity to this acceleration.)

	So let's say we make an underground ~~hyper loop~~ railway on a circular track on an angle facing inwards (so when it is at speed, the gravity of the railcar plus Mars' gravity faces directly down to the floor of the car).		So let's say we make an underground maglev railway on a circular track on an angle facing inwards (so when it is at speed, the gravity of the railcar plus Mars' gravity faces directly down to the floor of the car).

	If this circular track was 500 meters in diameter, then the car would have to go around the loop every 57 seconds, (say one RPM to round off). The hyper loop railway would have to go 55 meters per second, or 198 km/hour.		If this circular track was 500 meters in diameter, then the car would have to go around the loop every 57 seconds, (say one RPM to round off). The hyper loop railway would have to go 55 meters per second, or 198 km/hour.

	The main reason to make it a ~~hyper-loop~~ is to avoid wear on the wheel's bearings. This speed is doable with Earth trains using today's tech, which have to fight thru Earth's air pressure. (Japan's bullet trains go 320 km/h for example.)		The main reason to make it a magnetic levitation is to avoid wear on the wheel's bearings. This speed is doable with Earth trains using today's tech, which have to fight thru Earth's air pressure. (Japan's bullet trains go 320 km/h for example.)

	Assuming the train is 100% as long as the track, and that it is two meters wide, then there is 0.684 square kilometres of area for people to exercise or sleep in. If we make the train 3 stories high, then this area triples.		Assuming the train is 100% as long as the track, and that it is two meters wide, then there is 0.684 square kilometres of area for people to exercise or sleep in. If we make the train 3 stories high, then this area triples.

RichardWSmith: /* Long term medical effects of 38% gravity */ Added link.

2024-10-22T17:48:44Z

Long term medical effects of 38% gravity: Added link.

← Older revision		Revision as of 18:48, 22 October 2024
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	==Long term medical effects of 38% gravity==		==Long term medical effects of 38% gravity==
	As of 2024, no studies have researched this question. Once we have real data, please update this section.		As of 2024, no studies have researched this question. Once we have real data, please update this section. This should be a focus of [[Future research]].

	==Short term medical effects of 38% gravity==		==Short term medical effects of 38% gravity==

RichardWSmith: Made sentence clearer.

2024-02-06T18:50:18Z

Made sentence clearer.

← Older revision		Revision as of 19:50, 6 February 2024
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	If we find that there are no long term ill effects at, say, 0.8 gees of gravity, the speed of the train could be lowered. Alternately the radius could be increased (giving us more living area), without increasing the speed.		If we find that there are no long term ill effects at, say, 0.8 gees of gravity, the speed of the train could be lowered. Alternately the radius could be increased (giving us more living area), without increasing the speed.

	IF, and only if, we find that low gravity is a problem, then people could work 8 hours a day in the low gravity factories or farms. Then live and sleep in an underground habit at Earth gravity. ~~This~~ would also reduce the radiation dose.		IF, and only if, we find that low gravity is a problem, then people could work 8 hours a day in the low gravity factories or farms. Then live and sleep in an underground habit at Earth gravity. Assuming it is underground, this would also reduce the radiation dose.

	===Eureka Settlement Proposal:===		===Eureka Settlement Proposal:===

RichardWSmith: Updated the date.

2024-01-29T01:21:19Z

Updated the date.

← Older revision		Revision as of 02:21, 29 January 2024
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	==Long term medical effects of 38% gravity==		==Long term medical effects of 38% gravity==
	As of ~~2022~~, no studies have researched this question. Once we have real data, please update this section.		As of 2024, no studies have researched this question. Once we have real data, please update this section.

	==Short term medical effects of 38% gravity==		==Short term medical effects of 38% gravity==

RichardWSmith: /* Increasing Gravity Inside Long Term Mars Habitations */

2024-01-29T01:19:54Z

Increasing Gravity Inside Long Term Mars Habitations

← Older revision		Revision as of 02:19, 29 January 2024
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	If this circular track was 500 meters in diameter, then the car would have to go around the loop every 57 seconds, (say one RPM to round off). The hyper loop railway would have to go 55 meters per second, or 198 km/hour.		If this circular track was 500 meters in diameter, then the car would have to go around the loop every 57 seconds, (say one RPM to round off). The hyper loop railway would have to go 55 meters per second, or 198 km/hour.

	The main reason to make it a hyper-loop is to avoid ~~friction from~~ the ~~Martian dust~~. This speed is doable with Earth trains using today's tech, which have to fight thru Earth's air pressure. (Japan's bullet trains go 320 km/h for example.)		The main reason to make it a hyper-loop is to avoid wear on the wheel's bearings. This speed is doable with Earth trains using today's tech, which have to fight thru Earth's air pressure. (Japan's bullet trains go 320 km/h for example.)

	Assuming the train is 100% as long as the track, and that it is two meters wide, then there is 0.684 square kilometres of area for people to exercise or sleep in. If we make the train 3 stories high, then this area triples.		Assuming the train is 100% as long as the track, and that it is two meters wide, then there is 0.684 square kilometres of area for people to exercise or sleep in. If we make the train 3 stories high, then this area triples.

RichardWSmith: Made clearer what we are calculating.

2024-01-29T01:18:30Z

Made clearer what we are calculating.

← Older revision		Revision as of 02:18, 29 January 2024
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	The formula for centripetal force is:		The formula for centripetal force is:

	a = r(2 PI / T)^2. (a = acceleration, T = Time to rotate once, r = radius.)		a = r(2 PI / T)^2. (a = acceleration, T = Time to rotate once, r = radius.)
			(Note the acceleration only needs to be ~62% of Earth's gravity because we will add Mars' current gravity to this acceleration.)

	So let's say we make an underground hyper loop railway on a circular track on an angle facing inwards (so when it is at speed, the gravity of the railcar plus Mars' gravity faces directly down to the floor of the car).		So let's say we make an underground hyper loop railway on a circular track on an angle facing inwards (so when it is at speed, the gravity of the railcar plus Mars' gravity faces directly down to the floor of the car).

RichardWSmith: Added new sections.

2022-11-29T20:02:31Z

Added new sections.

← Older revision		Revision as of 21:02, 29 November 2022
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	There is no medical evidence for the effects on Mars' [[gravity]] on Earth life. Although we could simulate Mars' gravity on the International Space Station using a centrifuge, (with some mice in a cage for example), this experiment has never been done. Plants have been grown successfully in zero gee, so it is likely they would also be viable in 38% gee.		There is no medical evidence for the effects on Mars' [[gravity]] on Earth life. Although we could simulate Mars' gravity on the International Space Station using a centrifuge, (with some mice in a cage for example), this experiment has never been done. Plants have been grown successfully in zero gee, so it is likely they would also be viable in 38% gee.

	==~~Medical~~ effects of 38% gravity==		==Long term medical effects of 38% gravity==
	As of 2022, no studies have researched this question. Once we have real data, please update this section.		As of 2022, no studies have researched this question. Once we have real data, please update this section.

	==~~'''Increasing Gravity Inside Long Term~~ Mars ~~Habitations~~'~~''==~~		==Short term medical effects of 38% gravity==
			People with bad knee and hip joints may find Martian gravity to be a boon. In the far future, Mars might be seen as an attractive retirement location for that reason. (Tho Luna with 1/6 of Earth's gravity may be even more attractive.)

			==Martian gravity in fiction==


			==Increasing Gravity Inside Long Term Mars Habitations==
	There is a simple way to increase gravity within a major base on Mars... A centrifuge.		There is a simple way to increase gravity within a major base on Mars... A centrifuge.

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	IF, and only if, we find that low gravity is a problem, then people could work 8 hours a day in the low gravity factories or farms. Then live and sleep in an underground habit at Earth gravity. This would also reduce the radiation dose.		IF, and only if, we find that low gravity is a problem, then people could work 8 hours a day in the low gravity factories or farms. Then live and sleep in an underground habit at Earth gravity. This would also reduce the radiation dose.

	===Eureka Settlement Proposal:===		===Eureka Settlement Proposal:===
	A [[Gravity\|rotating settlement habitat]] is proposed [[Gravity\|here]]. The Eureka <ref>https://macroinvent.com/wp-content/uploads/2019/03/Eureka-Mars-Settlement-Concept.pdf</ref>space Settlement was proposed for the [[Mars Colony Design Contest\|2019 Mars society design contest.]]		A [[Gravity\|rotating settlement habitat]] is proposed [[Gravity\|here]]. The Eureka <ref>https://macroinvent.com/wp-content/uploads/2019/03/Eureka-Mars-Settlement-Concept.pdf</ref>space Settlement was proposed for the [[Mars Colony Design Contest\|2019 Mars society design contest.]]

RichardWSmith: Added new section.

2022-11-29T19:57:42Z

Added new section.

← Older revision		Revision as of 20:57, 29 November 2022
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	There is no medical evidence for the effects on Mars' [[gravity]] on Earth life. Although we could simulate Mars' gravity on the International Space Station using a centrifuge, (with some mice in a cage for example), this experiment has never been done. Plants have been grown successfully in zero gee, so it is likely they would also be viable in 38% gee.		There is no medical evidence for the effects on Mars' [[gravity]] on Earth life. Although we could simulate Mars' gravity on the International Space Station using a centrifuge, (with some mice in a cage for example), this experiment has never been done. Plants have been grown successfully in zero gee, so it is likely they would also be viable in 38% gee.

			==Medical effects of 38% gravity==
			As of 2022, no studies have researched this question. Once we have real data, please update this section.

	=='''Increasing Gravity Inside Long Term Mars Habitations'''==		=='''Increasing Gravity Inside Long Term Mars Habitations'''==