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Chang'e 6 lunar sample return mission returns with samples from moon's far side

theguardian.com

11–20 of 129 posts

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#11
post #3

What are they expecting to be different about samples from the moon's far side to those previously collected?

No idea what they’re expecting, but I would expect some interesting differences based on our current understanding of the geological differences between the two sides. Apparently the near side was warmed by Earth early in the Moon’s history which meant the far side cooled more quickly and developed a thicker crust.

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#12

Earlier quoted context omitted.

I do not know for a fact, but I wouldn't think there is a single chance in hell that living in an environment with 1/6th of the gravity we've got on earth would not cause long term effects in your health, specially to the bones and muscle.

Probably fine .. as long as you don't come home.

Also changes eye shape over time, causing vision issues, etc.. Longer you're up there the more starts to go wrong. We were built to fight off gravity. I think its worth considering that it may be fundamentally impossible for humans to reproduce/gestate babies/live entire lifetimes/generations in low gravity conditions.

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#13
post #3

What are they expecting to be different about samples from the moon's far side to those previously collected?

> What are they expecting to be different about samples from the moon's far side to those previously collected?

Different bragging rights.

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#14
post #2

The international moon base plan is fascinating. https://en.wikipedia.org/wiki/International_Lunar_Research_S... (nuclear power plans by Russia not so much) Is there enough gravity on the moon to prevent the long-term health problems from the space station like bone, muscle and vision loss?

> nuclear power plans by Russia not so much Why? Any lunar base without nuclear power plans is not a serious effort.

Solar PV linked to battery storage is the obvious energy source for a moonbase. All reactors require coolant circulation and water is going to be among the most valuable commodities on the moon, not something you want to circulate through a reactor (where you inevitably get tritium formation, making the water unsuitable for other uses).

Maybe you could use helium or liquid sodium metal as the primary coolant, but then you still need to generate electricty via secondary water coolant loop that runs a steam-powered turbine. Really not plausible on the moon.

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#15

Earlier quoted context omitted.

> nuclear power plans by Russia not so much Why? Any lunar base without nuclear power plans is not a serious effort.

I often wondered, how do you deal with all the waste heat from a fission power reactor, in a vacuum? Giant radiators? edit: fixed typo, derp. fusion=fission

Perhaps? Any reason that sounds silly to you?

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#16

Earlier quoted context omitted.

> nuclear power plans by Russia not so much Why? Any lunar base without nuclear power plans is not a serious effort.

I often wondered, how do you deal with all the waste heat from a fission power reactor, in a vacuum? Giant radiators? edit: fixed typo, derp. fusion=fission

It would likely be a thermal reactor, I guess? So no waste heat, since the little heat it gives is used to generate electricity.

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#17

Earlier quoted context omitted.

Probably fine .. as long as you don't come home.

Also changes eye shape over time, causing vision issues, etc.. Longer you're up there the more starts to go wrong. We were built to fight off gravity. I think its worth considering that it may be fundamentally impossible for humans to reproduce/gestate babies/live entire lifetimes/generations in low gravity conditions.

Well there's a world of difference between micro-gravity (where there have been problems with nice) and low gravity like on the moon (where there's been no experiments)

If you did have viable babies in low (not zero) gravity situations though, would you in fact be starting a new species.

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#18
post #3

What are they expecting to be different about samples from the moon's far side to those previously collected?

The reason you seek to explore what you don't know is because you don't know what you don't know. In general I don't think people really appreciate how ridiculously little we know about everything outside of our planet. Like for instance it was only in 2013 (!!!) that it was discovered that Mars' soil is relatively 'moist', about 2% water by mass. And that's just the topsoil layer - it's suggestive that below the sur…

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Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#19
post #3

What are they expecting to be different about samples from the moon's far side to those previously collected?

They hope to test their hypothesis that volcanoes on that side became inactive 4 billion years ago. Great question frankly, this article goes into it in much more detail (I just selected a likely looking blurb, there are other elements of the theory)

https://www.cnsa.gov.cn/english/n6465652/n6465653/c10523137/...

Re: Chang'e 6 lunar sample return mission returns with samples from moon's far side

#20
post #15

Earlier quoted context omitted.

I often wondered, how do you deal with all the waste heat from a fission power reactor, in a vacuum? Giant radiators? edit: fixed typo, derp. fusion=fission

Perhaps? Any reason that sounds silly to you?

No, and this is not some attack on nuclear power. I am just curious. On earth, nuclear power plants use lots of water and cooling towers. How does that work in a place with no spare water?

I also meant to write fission in my original question, not fusion.

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