Travel to the moon for $1.5 billion

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December 13th, 2012 at 10:35:16 AM permalink
Pacomartin
Member since: Oct 24, 2012
Threads: 661
Posts: 7569
Quote: Nareed
Why build a space elevator on the Moon anyway? An electromagnetic launch track would be easier, cheaper, more versatile and a whole lot more convenient. Plus you could, in time, build as many as needed all over the Moon.


In the paper Lunar Space Elevator paper Dr Pearson says specifically mentions the launch track:


Quote: Pearson
In order to use fully the lunar resources, however, a transportation system must be developed to bring thousands of tons of lunar surface material into lunar orbit, to space colonies, and into high Earth orbit. One scheme to alleviate the high cost of rocket launching is that of the electromagnetic launcher proposed by Clarke and developed into a feasible system by O’Neill and his colleagues . A linear motor on the lunar equator would accelerate small pellets of lunar ores into an orbit intersecting the L2 liberation point behind the moon. Here a ”mass catcher” would retrieve the pellets and send them via slow space freighter to space colonies for construction of solar power satellites.

The purpose of this paper is to investigate an alternative to this system–an alternative which shows the promise of greater efficiency, greater versatility, and eventually greater economy. The technique which will be investigated here is the use of anchored satellites for the launching of lunar materials into cislunar space. After the rocket and the linear accelerator (for airless worlds only), the anchored satellite represents the only known method of launching payloads to planetary
escape velocity.



It does look as if the company is going to the lunar surface at some point. No idea how many lunar orbit trips will come first.
December 14th, 2012 at 6:53:51 AM permalink
Nareed
Member since: Oct 24, 2012
Threads: 306
Posts: 10240
Quote: Pacomartin
In the paper Lunar Space Elevator paper Dr Pearson says specifically mentions the launch track:


That's a launch track.

Nothing keeps you from building dozens or hundreds, or from aiming them in any direction and giving them any velocity (though you may want to watch the acceleration; the inertia of a mass is the same regardless of the local gravity field, you know, what witht he Higgs' boson and nature's unflinching laws).

A space elevator requires a terminus in Clarke orbit. On Earth that's 36+ thousand kilometers above sea level, flat on the equator. I've no idea what it is on the Moon, or how stable such an orbit would be. The Earth's Clarke orbit, where all the comsats are, is not stable at all. that's why comsats have a lifespan: the time it takes them to use up their fuel keeping station
If Trump where half as smart as he thinks he is, he'd be twice as smart as he really is.
March 1st, 2017 at 4:52:44 PM permalink
Pacomartin
Member since: Oct 24, 2012
Threads: 661
Posts: 7569


Space -X says it has two customers that are prepared to pay for a lunar trip. No word on what he will charge them.
March 1st, 2017 at 5:09:51 PM permalink
terapined
Member since: Aug 6, 2014
Threads: 35
Posts: 2677
What concerns me regarding tourist space travel is that its very unhealthy
No way I would consider space travel at my age
Our bodies are not built for space travel
Bone and muscle deterioration is the biggie but extended weightless environment messes with all kinds of body systems
We are a long long way from healthy space travel

https://en.wikipedia.org/wiki/Effect_of_spaceflight_on_the_human_body
Sometimes we live no particular way but our own - Grateful Dead "Eyes of the World"
March 1st, 2017 at 5:42:56 PM permalink
Nareed
Member since: Oct 24, 2012
Threads: 306
Posts: 10240
Quote: terapined
https://en.wikipedia.org/wiki/Effect_of_spaceflight_on_the_human_body


A week's trip won't have any appreciable or lasting effect.
If Trump where half as smart as he thinks he is, he'd be twice as smart as he really is.
March 1st, 2017 at 6:23:25 PM permalink
rxwine
Member since: Oct 24, 2012
Threads: 114
Posts: 4541
Quote: Pacomartin
Space -X says it has two customers that are prepared to pay for a lunar trip. No word on what he will charge them.


Wonder how that deal went? Half at the beginning, the rest when they get back. Or all upfront.
No one has ever proven I am not God.
March 2nd, 2017 at 11:50:46 AM permalink
Nareed
Member since: Oct 24, 2012
Threads: 306
Posts: 10240
Quote: Pacomartin
Space -X says it has two customers that are prepared to pay for a lunar trip. No word on what he will charge them.


The devil is in the details.

Did you know they need to secure FAA permission first? And I guess that's just for starters...

SpaceX has been working on the Dragon capsule for a long time. They've orbited several with supplies for the ISS (they just launched one last week). And they're under contract with NASA to provide rides to the ISS to astronauts on it. They've also been developing the Falcon 9 heavy, which is three Falcon 9 first stages and a Falcon 9 upper stage.

All this means it's quite possible for SpaceX to launch such a flight. Just not right now.

But I wonder what the point is.
If Trump where half as smart as he thinks he is, he'd be twice as smart as he really is.
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