And a space elevator, of course, would only cost about a Trillion, and there's this little problem of it hitting something (we'd have to make Earth Orbit absolutely pristine and keep it that way) and there's a problem with the kinetic energy if it falls down. Sort of like having many atom bombs go off.
Maybe someday. But right now making rockets as cheap as they can be is a better idea. It's only $200K to fuel up a Falcon 9. We don't get the whole thing back in working order yet, but that would be a lot easier than making a space elevator.
Dragon 2 isn't built yet. The escape test was a boilerplate capsule more like a Dragon 1 than 2. Dragon 2 has not demonstrated a soft landing, because it's not built yet. That was the Falcon 9 first stage.
Also, you can't get Dragon 2 down to the Moon and back up on it's own. Not enough delta-V. You would need to have Dragon ride on top of something that can hold enough fuel. Like a larger version of the Apollo Service Module.
The Command/Service module was originally intended to land on the moon and return without the LEM, before NASA bought the LEM concept, and was overpowered for the mission it got. Dragon is larger and heavier, but a lunar landing one would probably look a lot like an Apollo Command and Service module, and legs.
And yeah, Orion: I'm Not on Board. Big expensive obsolete rocket with no mission that makes sense.
But good luck getting Elon Musk to focus on the practical and eminently desirable target of the Moon. He isn't interested. It's only Mars for Elon.
I try not to watch all of the Mars Colonial Transport speculation. Falcon 9 and Dragon are great, and they're here, and we could do so much with them.
I would be more interested in this if it worked the other way, warming my house.
There are lots of designs for doing that. Look at any renewable energy bulletin board (such as fieldlines.com).
Common thread is:
- Black (or otherwise visible light absorbing) target.
- In an insulated box.
- With a glass window (that does NOT have an infrared reflective coating)
- And some way of transferring the heat from the black target to the house air.
Glass is opaque to infrared and passes visible light. Sunlight goes through, is absorbed by the black material, and heats it (to the tune of about a kilowatt per square meter at noon). The material re-radiates, but it is far too cool to re-radiate in the visible spectrum. So it re-radiates in the infrared, which doesn't escape through the glass and is thus re-absorbed.
It's called "The Greenhouse Effect". B-)
In one of my favorite designs the black target is a series of tubes consisting of used aluminum drink cans with the tops and bottoms removed, painted black. They're very good at absorbing light, because it takes multiple bounces down the valley between the tubes, giving the paint many chances to absorb it. A 4" computer fan pumps air through the box to extract the heat.
But there are LOTS of other designs. Including houses with large south or south-east facing windows and overhanging roofs that shade them in the summer but not in the winter (to rough-tune the absorption). The floor, walls, furniture, etc. serve as the visible light absorber.
My ranch house works like that - a little too well. In the afternoon it will git to 90+ degrees when it's single-digit temperatures outside.
It's a neat idea, but what happens in the winter?
Put a cover over it.
Glass is good. It is pretty much opaque to far infrared. Instead of seeing the cosmic background temperature of a few degrees kelvin, it will see the temperature of the glass - which is about the same as its own temperature. So the radiative heat flow will be just about zero.
But ANYTHING opaque to infrared will do the same.
Another approach: Instead of coating the house, coat a radiative cooler to make chill water, and pump that through a heat exchanger in your forced air heating/air conditioning system. Don't want cooling? Don't pump the water. (Adjust how much you pump it to regulate your temperature.)
That's not "no power", but pumping chill water is very little power, and you need to circulate the air anyhow. Most of the energy cost of air conditioning is refrigeration, and you still get that for free.
RTFA. Then follow the link to the paper. They DID try it on humans. Worked reasonably well (though the sample was small so it was more "does this maybe work on people, too? Is it worth a big study to check?" rather than "do all the results reproduce in people just like mice or are they quantitatively different in THIS way?").
Interestingly, they used a proprietary commercial boxed Fasting Mimicing Diet - L-Nutra's ProLon (Developed by a team including a USC Davis professor specializing in gerontology and life-extension) - on the human experimental subjects.
I'm just not obsessed with racial guilt because it's bullshit.
All groups take advantage of their hegemony. Feeling guilty about it is just being stupid. I 100% guarantee you the next hegemons won't give two shits about whatever guilt they should feel about oppressing you. Or me.
Go back to your fake news...MSNBC? CNN? whatever floats your boat.
Well, that's one way of looking at it. Another way is that black people do a lot more murder on a per capita basis. As it turns out, the chances of getting killed by a white guy are less for a black person than the reverse. Which is indicative of the overall murder rate in the black community being several times (something like 5+ times) what it is amongst whites.
Anyway paying undue attention to a single person amongst the 6k or so that are going to die this year is politically motivated, as usual.
Are you part of the 18% or so that do? Really...
You can do your own research.
I agree with you. People say a lot of stupid things when they are drunk. But let's not let any opportunity to blame Trump go to waste, right?
And Leftists wonder why they are getting tuned out.
500 white people are killed by blacks every year and 200 blacks are killed by whites every year. One group is 70% of the country, the other is 13% of the country. I notice the same people whining about this event aren't paying attention to those statistics. A couple people assuredly died in interracial murders since that story broke.
But this one drunken fight in Kansas - we have no idea what was actually said and what provoked this - is somehow more significant.
Nothing is more admirable than the fortitude with which millionaires tolerate the disadvantages of their wealth. -- Nero Wolfe