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#1 Re: Life support systems » Eat Like a Martian » 2008-05-28 08:06:40

Fantastic.

Why do Metal Halide and Sodium lamps still exist?

#2 Re: Life support systems » Eat Like a Martian » 2008-05-27 22:23:07

And for extra lighting needed during dust storms, led-lights are the way to go. You can focus them on the leaves withouth burning them, and energy-effeciient are off course the major advantages.

I thought you had to use specialized lights giving off certain spectrum's. Can you really use LEDs?

#3 Re: Human missions » Move your Business to KSC » 2008-05-27 22:13:51

Volume.

Employ them not by using absurd numbers for a handful of launches, but by prepping and assembling many launches.

#4 Re: Interplanetary transportation » Retrorockets in vogue? » 2008-05-27 22:09:44

So, in summary, retro rockets are not a particularly good idea for slowing down from orbital/transit velocities. Heat shields at least and perhaps parachutes too are the obvious way to go. The retro-burn for the Altair Lunar lander is the major reason why the Lunar surface payload is less than a sixth of the Ares-V LEO payload.

Why would I not make use of aerobraking, heat shields, parachutes, or any other innovations to land such large payload? I'm simply saying that eventually your going to have to employ retrorockets for at least the last few miles to have a controlled landing.

#5 Re: Not So Free Chat » Did Iran become a player in space ? » 2008-05-27 22:03:10

I would have hoped that after 40 years of living under the threat of mutually assured destruction, the world would go to great lengths to avoid sliding back into that situation.

#6 Re: Not So Free Chat » The American Caesar » 2008-05-27 21:49:28

As much of an Obamanation the US would become if Obama were elected, I think setting precedent of using military coups to right the errors of the electorate and the parties alike would be far worse in the long run. If one general can take it upon himself to defend and uphold the Constitution, all of them can. That the Constitution can be taken in so many different ways by people still considered sane means we got to sit down clarify it. 200+ years is a good run, but its like underwear, if people keep stretching it like they have, sooner or later its no longer going to perform its original function.

What I think we are seeing the slow unraveling of the two entrenched superpower parties. Just look at the number of people dissatisfied with their parties nominee. And then look at the number of people who think both partys are only interested scheming for power. I think your eventually going to see both current parties splintered to the point were there is a single, nationalist supermajority, with what is left of each of the hippy communists, and corporate autocrats taking maybe 15% from either side.

#7 Re: Human missions » Near Earth Object (NEO) missions » 2008-05-27 20:51:04

The challenge of colonizing an asteroid is the same as mining one. If you can properly anchor yourself to the surface enough to manipulate it, you can either poke at it and collect the pieces that fall off, or build maglev hab that spins around fast enough to provide gravity.

Phobos and Deimos are perfect places to test this, because anything they lack is a short trip from Mars.

#8 Re: Interplanetary transportation » Retrorockets in vogue? » 2008-05-27 07:14:59

You mean slowing to near-zero relative to Mars before reaching the atmosphere? The fuel bill would be enormous.

So would the payload.

#9 Re: Interplanetary transportation » Retrorockets in vogue? » 2008-05-26 21:09:41

The ultimate goal is landing a horizontally configured Ares V class cargo.

#11 Re: Human missions » Armstrong Lunar Outpost - status » 2008-05-24 22:56:27

If the goal is to construct large permanent manned structures, then it makes sense to design it to mitigate these sort of threats because over their lifetime its almost sure to be an issue.

Whats the best way to make use of regolith to shrug off an impact? Whats the best combination of materials to to allow penetration but prevent a concussion?

#12 Re: Not So Free Chat » Has Multiculturalism Failed ? » 2008-05-24 22:05:28

It doesn't matter if 25% of kids in school don't speak English at home. They will learn English has their second language and will be able to speak it. This isn't America where it is possible to spend decades living in an ethnic enclave where you don't have to speak English. These kids will be exposed to English every single day.

Whether they actually pick up the language is not the issue, thanks to political correctness, they are not required to speak it. The result is people bend over backwards to accommodate them to avoid "discrimination". Under such conditions, its actually more profitable to not learn the language, if only to extract more assistance.

#13 Re: Not So Free Chat » Current Gasoline/Petrol Price$ » 2008-05-23 21:25:16

It also doesn't excuse the governments criminal restrictions on the oil industry and over taxation.

lol  This is why I love Americans. Despite taxes on Oil companies being cut and them getting record profits you complain about taxes. The Oil companies aren't losing any money. They are making so much money they can wipe their asses with a Benjamin. If anything the government should threaten them with a tax rise if they don't decrease the share of money they get from petrol. It's not going to hurt them much. If they lose 50% of their profits they would still be filthy rich.  It's not like they  are reinvesting that money into alternative energy.

Thats because we have a basic understanding of economics. Do you know what happens when you tax a corporation? They pass the cost on to the consumers until the consumers refuse to buy it and they go into the red, the stock price plummets, and they go out of business, or alternatively, they eat the cost, go into the red, the stock price plummets and they go out of business.

What exactly entitles you to tell others what to do with their money?

#14 Re: Not So Free Chat » Current Gasoline/Petrol Price$ » 2008-05-23 21:13:53

Total Bullshit.

The Oil companies love the current high prices and have had their profits jump to incredibly highs since 2003!! They love the current situation. They are totally profiteering of the instabilities and wars in the Middle East.

Oil companies have nice little things called "profit sharing agreements" with the Kingdom of Saudi Arabia. They make as much money out of speculation as the Opec countries.

The US government get a higher percent that the oil companies do. That is why nothing is changing.

#15 Re: Not So Free Chat » The Flag that Barack Obama won't wear » 2008-05-23 21:08:17

Jeremiah Wright is not going away, we'll see how smart the American people are come this November. Fox certainly is not going to let go of this story, and I hope this helps.

Just looking at the reaction from America. It appears the people in the South particularly older white people and those in the MidWest aren't that smart. I think it's called Redneckitis.  :twisted:

No, you see we are just bitter because we believe in the right of self defense and a power greater than ourselves.

At least the problems with the respective two major Parties are the following: With Republicans its a matter of corruption, and the Economy, with Democrats it a matter of Patriotism.

Patriotism? What would it take for you to think that the Democracts love Ameica? Bombing Iran to death?

To stop doing things that weakens the country and the individual and makes it harder to live here would be a nice start.

By the way. Are you guys going to be voting for the Hitler loving McCain?

As opposed to the Marxist loving Barrack Obama, or the Hillary Clinton loving Hillary Clinton?

As for the lefts blatant and failed effort to infect McCain with QPS (Questionable Pastor Syndrome) that your referencing, it's just furthur proof that McCain is hands down more qualified than Obama, because McCain has the stones rid himself of people who spend all their time swallowing their own feet.

#16 Re: Human missions » Armstrong Lunar Outpost - status » 2008-05-22 21:16:07

So the Apollo guys were lucky!

Just reinforces the need for regolith covered habitat in my view.

These explosions don't require oxygen or combustion. Meteoroids hit the moon with tremendous kinetic energy, traveling 30,000 mph or faster. "At that speed, even a pebble can blast a crater several feet wide. The impact heats up rocks and soil on the lunar surface hot enough to glow like molten lava--hence the flash."

With those kind of forces, were really talking about armor. And not just for permanent structures, but for anything exposed. You wouldn't want your accent module turned into swiss cheese.

And we'll probably need an orbital radar system to at least get some warning.

#17 Re: Human missions » Working outdoors - heat reflecting structure » 2008-05-22 20:03:34

It could be very useful for any in depth excavation and construction. Particularly for dust control, but I would imagine you could whittle away at other life support requirements, like temperature, pressure and air.

Anything we can do to reduce the need for bulkier and heavier space suits is worth it. Quickly creating a large, redeployable outdoor shelter that reduces or eliminates any or all of the radiation or atmospheric needs of the astronauts while working out doors allows them to use much cheaper, flexible even expendable suits, and allows them to be much more effective. 

Of course just how much depends on how well you can temporarily seal it to the surface.

#18 Re: Human missions » Armstrong Lunar Outpost - status » 2008-05-22 19:36:22

We may have to build Fort Armstrong to survive the constant bombardment.

100 Explosions on the Moon... 101... 102... 103...

May 21, 2008: Not so long ago, anyone claiming to see flashes of light on the Moon would be viewed with deep suspicion by professional astronomers. Such reports were filed under "L" … for lunatic.

Not anymore. Over the past two and a half years, NASA astronomers have observed the Moon flashing at them not just once but one hundred times.

"They're explosions caused by meteoroids hitting the Moon," explains Bill Cooke, head of NASA's Meteoroid Environment Office at the Marshall Space Flight Center (MSFC). "A typical blast is about as powerful as a few hundred pounds of TNT and can be photographed easily using a backyard telescope."

86_strip.gif
impactmap_strip.jpg

#19 Re: Not So Free Chat » Current Gasoline/Petrol Price$ » 2008-05-22 18:36:45

Oddly enough, the housing and credit bubble may have a lot to do with it. I wish I remembered were I saw it, but I saw a graph showing a direct link between the falling value of the dollar, and the rising price of oil. The fall of the dollar is adversely effected every time the fed releases large sums of cash to keep liquidity in the banks when they make bad loans.

It may very well be simple inflation. Those buying and selling oil simply need more dollars to get the same value. Of course, $4/gal is still better than letting the banks destroy themselves, dragging everyone else down with them.

It also doesn't excuse the governments criminal restrictions on the oil industry and over taxation.

#20 Re: Human missions » STS-124 Discovery » 2008-05-22 13:23:59

With all the wild fires going on down there, what are the odd of the smoke disrupting the launch?

#21 Re: Human missions » International Space Station (ISS / Alpha) » 2008-05-22 07:34:54

Breakdown in life support system - crew forced to evacuate in Soyuz smile - 21 May 2008

Russian ASU Malfunction:    While using the ASU toilet system in the SM, the crew heard a loud noise and the fan stopped working.  After some troubleshooting the crew reported that the air/water Separator (MNR-RS) was not working.  The crew then replaced the separator with a spare unit but reported afterwards that the ASU lacked suction.  The crew next replaced the F-V filter insert, which provided good suction for a while but again exhibited weak suction.  TsUP/Moscow instructed the crew to deactivate the ASU and use the toilet facility in the Soyuz spacecraft.

Oh crap.

#22 Re: Not So Free Chat » Did Iran become a player in space ? » 2008-05-20 21:08:28

we should give them something to lose if they don't...

You realize that is precisely Israels policy against the Arabs?

No one wants to believe it, but this all started because the Arabs attempted to deny Jews everything the Arabs claim to lack today.

#23 Re: Not So Free Chat » The Flag that Barack Obama won't wear » 2008-05-19 18:47:38

It would be one thing if he was consistent. He's not.

He was the one who made a big stink about how he thought that people used it to compensate for something.

Now that he realizes that the "Fly Over States" actually do get a vote, hes doing a sudden about face.

#24 Re: Human missions » Near Earth Object (NEO) missions » 2008-05-19 07:18:34

What these plans don't include is a whole lot of surface payload. Of course the best we can do is the equivalent of scuba dive on the surface, but we can teleoperate probes from earth.

Strap that Centaur stage to the surface and set up shop.

#25 Re: Life support systems » Compressed gas energy storage. » 2008-05-18 20:24:55

You want to store compressed gasses underground?

Doesn't anyone remember Pompii?

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