02-21-2018, 02:38 PM | #11 | |
Join Date: May 2005
Location: Oz
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Re: Weather in a Dysonish sphere
Quote:
Surface gravity of the uniform sphere of breathemix would be about 16.5 × 10^4 m/s^2 = 1 682 gees. Last edited by Agemegos; 02-21-2018 at 03:22 PM. |
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02-21-2018, 02:57 PM | #12 |
Join Date: Sep 2007
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Re: Weather in a Dysonish sphere
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02-21-2018, 03:23 PM | #13 |
Join Date: May 2005
Location: Oz
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Re: Weather in a Dysonish sphere
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02-21-2018, 03:32 PM | #14 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Weather in a Dysonish sphere
In which case the 'sun' is a naked singularity, and the physics probably don't make sense (but hey, it's a magic setting).
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02-21-2018, 04:34 PM | #15 | |
Join Date: Jun 2006
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Re: Weather in a Dysonish sphere
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Seriously I don't think this is a sustainable natural system - it's either being maintained by god-like power (in which case the "weather" is whatever said power wants it to be) or a very recent (like thousands of years tops) creation that hasn't quite had enough time to fall apart yet.
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02-21-2018, 07:20 PM | #16 |
Join Date: Jun 2006
Location: Earth, mostly
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Re: Weather in a Dysonish sphere
Which of Niven's settings? The Ringworld spins for effective gravity - its rotational speed of 770 m/s gives it slightly under one Earth gravity. The air is held aboard by massive walls around the edges.
The Smoke Ring is in fact a ring of gases, with low gravity throughout, spun off of a gas giant orbiting a binary pair where one star is a yellow dwarf and the other is a neutron star. Maneuvering through the Ring is... tricky; most people never leave the Integral Trees they grew up on. The disc he conceived (but never wrote stories on) is a flat disc like a record, with a star in the middle, and air once again held in place by walls. Gravity would be perpendicular to the plane of the disc, and the area would be in a perpetual twilight (although a day/night cycle could be approximated by "bobbing" the disc "up" and "down"). However, if you decide to solve any issues using magic, make sure you don't also use his magic system. You wouldn't want to be living in, say, the sphere discussed earlier, with things kept from falling into the sun with magic, when the mana fails...
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02-21-2018, 08:23 PM | #17 |
Join Date: Nov 2004
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Re: Weather in a Dysonish sphere
Yeah, apparently I need a lot more handwaving than I realized. I forgot about several of the effects of spin. Blast. I was hoping for a slightly more clockwork setup, so I didn't have to come up with a reason why it still worked. Oh well. I put some local sapients in, probably they have gods.
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02-22-2018, 04:32 AM | #18 | ||
Join Date: Sep 2007
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Re: Weather in a Dysonish sphere
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The disc was famously mentioned by Larry Niven in his megastructures survey "Bigger Than Worlds", but it's generally attributed to Dan Alderson (including by Niven). Quote:
Last edited by Anaraxes; 02-22-2018 at 08:48 AM. |
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02-22-2018, 05:43 AM | #19 |
Join Date: Sep 2008
Location: near London, UK
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Re: Weather in a Dysonish sphere
And was used in fiction by Charlie Stross ("Missile Gap").
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02-22-2018, 08:46 AM | #20 |
Join Date: Nov 2004
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Re: Weather in a Dysonish sphere
It's a mix of the smoke ring and Howard Taylor's Eina-Oafa, crammed inti the Spelljammer setting. I think releasing a buch of giant air elememtals will solve my problems well enough. As it turns out, none of my players have read any Niven anyway, so it won't invite invidious comparison.
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