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China lands Chang'e-4 on far side of Moon

planetary.org

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Re: China lands Chang'e-4 on far side of Moon

#201

Post by 794CD01 »

nosequel wrote: post #159
vermontdevil wrote: post #104

Awesome. Too bad US freezes China out in working with NASA on space exploration. I think we all should partner up despite our political differences.

China doesn't exactly play nice with others. Even other tech companies have almost given up on working with China. When you deal with them, it is a one way street. What would the US get from any partnership with China besides China stealing any technology they could get their hands on?

If everyone were working together, it wouldn't be stealing. I don't steal someone's software when I fork a project on github, and they don't steal mine when they accept my pull request.

Re: China lands Chang'e-4 on far side of Moon

#202

Post by [deleted] »

stcredzero wrote: post #178
jackconnor wrote: post #175

Earlier quoted context omitted.

If you read John Varley's Titan series or Neal Stephenson books like Seveneves they regularly call LaGrange points "L2", "L4", etc. I called it a lasso because, if you look at the diagram, it literally looks like a lasso.

If you read John Varley's Titan series or Neal Stephenson books like Seveneves they regularly call LaGrange points "L2", "L4", etc. Never got around to Titan. I really liked Seveneves. I think Sonar Taxlaw is the most perfect woman, next to my wife. Nothing wrong with referring to L2, L4, L5... I called it a lasso because, if you look at the diagram, it literally looks like a lasso. Arrgh! That would be like when my…

[deleted]

Re: China lands Chang'e-4 on far side of Moon

#203

Post by mediocrejoker »

SCAQTony wrote: post #126
jackconnor wrote: post #3

The way they used the L2 point to lasso a relay satellite so they could transmit information from the rover on the far side is stunning too. This was really brilliant, China's space program has really become something.

It is known as radio repeating. Radio stations use them to boost their signals into new territories. Cell towers too. Radio repeating: "[It's]...a combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances. A repeater sited at a high elevation can allow two mobile stations, otherwise out of line-of-sight propagation range…

Although radio receivers on earth don't orbit la grange points.

Re: China lands Chang'e-4 on far side of Moon

#204

Post by mhandley »

jackconnor wrote: post #3

The way they used the L2 point to lasso a relay satellite so they could transmit information from the rover on the far side is stunning too. This was really brilliant, China's space program has really become something.

This nicely explains the relay's orbit and the trajectory they took to get there: http://www.planetary.org/blogs/guest-blogs/2018/20180615-que...

Re: China lands Chang'e-4 on far side of Moon

#205

Post by jaimex2 »

isostatic wrote: post #81
jaimex2 wrote: post #74

Earlier quoted context omitted.

Weird comment given Space X is about to start moon orbit tourism trips.

Yes, at the end of 2018 https://www.spacex.com/news/2017/02/27/spacex-send-privately...

2023 is the launch date. https://en.wikipedia.org/wiki/DearMoon_project

Re: China lands Chang'e-4 on far side of Moon

#206

Post by isostatic »

jaimex2 wrote: post #205
isostatic wrote: post #81

Earlier quoted context omitted.

Yes, at the end of 2018 https://www.spacex.com/news/2017/02/27/spacex-send-privately...

2023 is the launch date. https://en.wikipedia.org/wiki/DearMoon_project

Now. 3 years ago the launch date was 2018

It’s easy to promise. I hope spacex deliver, and I hope it does by 2030. That would be great.

But for now “about to start” is as meaningful as Branson’s statements back in 2003.

Re: China lands Chang'e-4 on far side of Moon

#207

Post by caycep »

stcredzero wrote: post #161
arduanika wrote: post #5

"...and if the dam breaks open many years too soon..." Perhaps interesting to note the origin of this name for spacecraft. The legend "Chang'e flies to the moon" (嫦娥奔月) lies behind the Mid-Autumn Festival (featuring mooncakes, as it were). Point is, the names of Chinese space missions are every bit as carefully steeped in tradition as, say, Mercury/Gemini/Apollo.

The legend "Chang'e flies to the moon" (嫦娥奔月) lies behind the Mid-Autumn Festival (featuring mooncakes, as it were). Point is, the names of Chinese space missions are every bit as carefully steeped in tradition as, say, Mercury/Gemini/Apollo. The People's Republic of China doesn't think of itself as a "Nation State." Instead, it thinks of itself as a "civilization state." A part of PRC's self appointed charge is to p…

that being said, in Chinese culture and education...lecturing is more of a thing. All these new agey experiential education has yet to sink in the mainland yet..

Re: China lands Chang'e-4 on far side of Moon

#208

Post by metta2uall »

nosequel wrote: post #159
vermontdevil wrote: post #104

Awesome. Too bad US freezes China out in working with NASA on space exploration. I think we all should partner up despite our political differences.

China doesn't exactly play nice with others. Even other tech companies have almost given up on working with China. When you deal with them, it is a one way street. What would the US get from any partnership with China besides China stealing any technology they could get their hands on?

That's like asking what the value of sharing is. China would provide funds, equipment, astronauts, etc that could be partially shared - like with the ISS. Note that the U.S. doesn't have to turn over source code or detailed designs to share stuff. Also, soon, China will develop original technology that others do not yet have (or already has?).

Re: China lands Chang'e-4 on far side of Moon

#209

Post by [deleted] »

794CD01 wrote: post #201
nosequel wrote: post #159

Earlier quoted context omitted.

China doesn't exactly play nice with others. Even other tech companies have almost given up on working with China. When you deal with them, it is a one way street. What would the US get from any partnership with China besides China stealing any technology they could get their hands on?

If everyone were working together, it wouldn't be stealing. I don't steal someone's software when I fork a project on github, and they don't steal mine when they accept my pull request.

[deleted]

Re: China lands Chang'e-4 on far side of Moon

#210

Post by mLuby »

tabtab wrote: post #154
ngcc_hk wrote: post #122

Earlier quoted context omitted.

Dark side is not really not dark side as the moon is shined by the sun all rounded and hence we have eclipse (by the moon). But I guess the other side would as someone posted no em wave from earth and that help.

So it's "radio dark", not "sun dark". (At least per human radios.)

Silent side of the Moon?
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