sfconsim-l at Yahoo! Groups

Re: More on the Starship from the Movie Avatar: Future Plot Points

Nyrath the nearly wise — Wed, 10 Feb 2010 13:40:21 GMT

... I had guessed about 10.000 tonnes myself, using flimsy assumptions. The propulsion system is unclear from the description. It sounds like a beam-core

More on the Starship from the Movie Avatar: Future Plot Points

Chevalieraberrant — Wed, 10 Feb 2010 09:12:58 GMT

I've kept on pondering Avatar's Venture Star, spurred on by Winchell's wonderful article on the site (a tip o' the hat, Winch!), and by information posted by

Re: Would a white dwarf Dyson sphere look like a red dwarf?

michael scott — Wed, 10 Feb 2010 08:34:59 GMT

the IR spectra emissions would not be Ion lines but pure thermal and likely pretty low end ones at that. ... [Non-text portions of this message have been

Re: Would a white dwarf Dyson sphere look like a red dwarf?

Erik Max Francis — Wed, 10 Feb 2010 02:52:20 GMT

... Well, of course. You're seeing the Dyson sphere, not the star inside. That's the point. None of the photons emitted by the star are the same as the ones

Re: Would a white dwarf Dyson sphere look like a red dwarf?

linguofreak — Wed, 10 Feb 2010 02:21:22 GMT

... I'd think that the spectral lines would be *way* off though. Instead of seeing hydrogen lines you'd be seeing lines for whatever the sphere was made of.

Re: Interstellar Navigation and position fixing methods: some notes

Abrigon Gusiq — Wed, 10 Feb 2010 01:11:28 GMT

Thank you. Mike ... From: "nyrathwiz" To: Sent: Tuesday, February 09, 2010 5:36 AM Subject: [sfconsim-l]

Re: Milky Way Transit Authority

Abrigon Gusiq — Wed, 10 Feb 2010 01:09:48 GMT

Plantets and stars and their system are gravity wells, so never know.. Might make for some fun to go Gravity Field Riding/Surfing? Yes it would be 3

Re: Would a white dwarf Dyson sphere look like a red dwarf?

Erik Max Francis — Tue, 09 Feb 2010 23:12:46 GMT

... Sure. If you have a Dyson sphere, then all you're seeing is the sphere itself (whether solid or not) reradiating the heat from inside. A Dyson sphere

Re: Aneutronic Relativistic Kinetic Impact Powered Rocket Propellant

Henry Cobb — Tue, 09 Feb 2010 23:04:30 GMT

... Then shoot bombs at your starship with proximity or remote detonation fuses if clocks are hard. -HJC We I think about you, I ionize myself.

Re: Would a white dwarf Dyson sphere look like a red dwarf?

Anthony Jackson — Tue, 09 Feb 2010 21:24:38 GMT

... Possible but unlikely. A Dyson sphere should either look like: a) a blackbody with an apparent temperature equal to the temperature of the sphere's outer

Re: Would a white dwarf Dyson sphere look like a red dwarf?

michael scott — Tue, 09 Feb 2010 21:17:57 GMT

red plus 3,000,000,000 years of cooling, more brown then red ... [Non-text portions of this message have been removed]

Would a white dwarf Dyson sphere look like a red dwarf?

Isaac Kuo — Tue, 09 Feb 2010 21:10:21 GMT

I notice that the luminousity of white dwarfs are in the same range as red dwarfs, but of course they're much smaller and bluer. But what if a Dyson sphere

Re: Aneutronic Relativistic Kinetic Impact Powered Rocket Propellan

Isaac Kuo — Tue, 09 Feb 2010 20:54:03 GMT

... It will see a wind of high speed plasma, all right, but going the wrong way--away from the starship. The stream of impactors starts off moving faster than

Re: Interstellar Navigation and position fixing methods: some notes

Isaac Kuo — Tue, 09 Feb 2010 20:34:39 GMT

... Sure, but that highlights the navigation issue. You're going to have a very specific sort of navigation problem requiring a very precise fix on the target

Re: Interstellar Navigation and position fixing methods: some notes

Nyrath the nearly wise — Tue, 09 Feb 2010 20:15:04 GMT

... Well, not to put too fine a point on it but there is a difference between "knowing where the heck in the entire galaxy that you are", and "ensuring that