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Matter Beam
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You can feel the raw emotion and passion. If you're feeling down, watch this again.
https://www.youtube.com/watch?v=tdBlOSroo80

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+Luke Campbell

I am curious after reading this information: https://en.wikipedia.org/wiki/Matter_wave

Atomic 'lasers' and matter waves... could they allow a particle beam to be focused like a laser to achieve similar effective ranges?

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Interstellar Trade is Possible!

I have a very long post coming up on my blog (10k+ words). Would you prefer it all together or in separate parts?



+Winchell Chung I am curious, have you updated the Gas-Core Nuclear Engine entry recently? I see a section dedicated to GNCRs using radiators to increase their temperature allowances.

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+Winchell Chung
You might want to update the exhaust velocity figures for various propellants using figures from this NASA report. Unsurprisingly, they are temperature dependent.

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19910012833.pdf

I'm sure you can extract some pretty quotes on ISRU too ;)

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High performance, high efficiency, high specific power electricity in space?

The Expansion-Condensation Closed-Cycle Nuclear Turbine Generator.

A nuclear reactor heats a coolant such as nitrogen to high temperatures and pressures, like a nuclear thermal rocket. Efficiency 90%.
The coolant is expanded through a nozzle to moderature temperatures, low pressures and high velocity, like a propulsive nozzle.
A multi-stage turbine converts the gas's energy into mechanical energy. This slows down the gas. Efficiency over 80%.
Electric generator converts turbine motion into electricity, efficiency 90%.
Second expansion nozzle condenses and liquefies the gas. This creates near-vacuum pressures, reducing back-pressure at the first nozzle. The liquid coolant is collected and pumped back into the reactor.

Overall efficiency is 65% to 80%. Nuclear reactor can have GW/ton specific power. Turbine can have several dozen MW per ton specific power, coupled with electric generator.

Can this work? Will it compare favourably to Stirling engines and thermocouples?

http://i.imgur.com/tnihUa1.png

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+Winchell Chung
I just went through the Feb 25 update.

I wanted to point out on the section 'Knowledge is Power': knowledge is probably the only practical thing to trade across interstellar distances...

This was a theme central to Charles Stross's Neptune's Brood.

http://io9.gizmodo.com/charles-strosss-neptunes-brood-is-the-perfect-book-fo-1210607929
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