The pictures are irrelevant; they are artist's impressions of black holes, which are local phenomena formed from collapsed stars. The Eridanus...
I wouldn't worry about excess oxygen; even if all the carbon dioxide in the atmosphere were converted into oxygen it would only raise the O2 partial...
Here's a fully updated version of my sci-fi novel Betrayals, set in the Orion's Arm scenario, with added timeline and glossary;...
The planets in our system seem to be unusually deficient in neon; the Sun has a normal amount , so it must have been lost during the process of...
Here's a table by Varga showing length of day for the last two billion years...
Apparent local gravity is always normal to the surface on an oblate, fast spinning planet. The ocean depth would not be affected, although certain...
I'm lazy, so I just use this calculator to determine the rotation rate of planets http://www.artificial-gravity.com/sw/SpinCalc/SpinCalc.htm for...
I should point out that I certainly do not endorse any suggestion that the Earth has rotated rapidly at any time in the last three billion years. Any...
This is very true. But if you were between this planet and its sun, looking towards the planet, all you would see is the relatively bright reflected...
Two reasons that this planet is quite not as black as it is painted; first of all it is hot, glowing at a temperature of 1200 Kelvin, so it won't...
Florian is correct, as far as his calculations go; but another factor that should be taken into the calculation is the fact that a fast-spinning...
[IMG] A torchship more ships from OA http://www.orionsarm.com/eg-topic/486d32520b1cc
[IMG] The Starlark (actually I designed this one about forty years ago)
[IMG] Mirror fusion ship
[IMG] Antimatter drive ship with large heat radiators
[IMG] freight ship (unladen)
some reasonably plausible ships I've made for Orion's Arm [IMG] Daedalus drive
Actually you don't need 'exotic matter' for wormholes, instead you need 'exotic energy' (which amounts to the same thing, really)....
Here's a couple of pages I've worked on for Orion's Arm about a gas giant ecology; Ruach The Ruach Singers note the reference at the bottom to...
There is a real problem with instant communication between galaxies; that is because of the simultaneity problem. Sometimes known as the...
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