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    Thread: Software from NASA
Post: Software from NASA

https://software.nasa.gov/ One that stands out being of likely interest here https://software.nasa.gov/software/GSC-16824-1 Quote:Evolutionary Mission Trajectory Generator (EMTG) EMTG is a global tr...
hanelyp Real Space 9 29,128 03-16-2017, 10:53 PM
    Thread: Multi-deck design I've been dreaming about
Post: RE: Multi-deck design I've been dreaming about

(12-01-2016, 10:05 AM)JoeStrout Wrote: FYI, I put a simple interactive walk-through model of this design up here. ... Feel free to give it a try! "The browser could not allocate enough memory for...
hanelyp Real Space 11 23,599 12-02-2016, 08:12 PM
    Thread: recent advancements in solar cells
Post: RE: recent advancements in solar cells

(12-01-2016, 08:26 AM)JoeStrout Wrote: On the other hand, as terrestrial solar gets better and cheaper, it chips away at the economic advantage of space-based solar power. ... A satellite in geostat...
hanelyp Real Space 2 8,248 12-02-2016, 08:09 PM
    Thread: working on asteroids
Post: RE: working on asteroids

Some of those appear to be spinning on the wrong axis. Otherwise very good.
hanelyp Dev Log 7 10,484 10-28-2016, 10:39 PM
    Thread: Population density
Post: RE: Population density

Comparing population density in big cities you should probably look at floor area, not just ground area. There's also consideration of agricultural area to supply the city.
hanelyp Real Space 2 8,610 09-09-2016, 10:37 PM
    Thread: Space Law and space settlement
Post: RE: Space Law and space settlement

I recognize 2 useful theories of property: A pragmatic theory equating ownership with control, and an ethical theory where property derives from work of the hand and sweat of the brow. Neither of th...
hanelyp Real Space 11 27,051 08-28-2016, 08:23 PM
    Thread: How big can a space colony get?
Post: RE: How big can a space colony get?

Surface to dispose of waste heat scales with R^2. Internal passages for access imply a similar limit on how much hardware you stuff inside. Pressure vessel loading is as you describe. The gotcha ma...
hanelyp Real Space 3 8,375 08-17-2016, 03:18 PM
    Thread: What would a hull breach look like?
Post: RE: What would a hull breach look like?

A search for "hypervelocity impact" returned http://www.cbsnews.com/news/navys-newest-weapon-kills-at-seven-times-the-speed-of-sound/ which has a dramatic image of what a projectile at Mach 7 can do t...
hanelyp Real Space 7 21,306 03-28-2016, 06:44 PM
    Thread: Planetary Resources Applauds U.S. Congress in Recognizing Asteroid Resource Property
Post: Planetary Resources Applauds U.S. Congress in Reco...

http://www.planetaryresources.com/2015/11/planetary-resources-applauds-u-s-congress-in-recognizing-asteroid-resource-property-rights/ Quote:Redmond, Wash. – November 10, 2015 — Planetary Resources, In...
hanelyp Real Space 3 6,675 11-10-2015, 06:33 PM
    Thread: Sci/Tech Milestones for Settling the Solar System
Post: RE: Sci/Tech Milestones for Settling the Solar Sys...

Beyond Mars nuclear power becomes increasingly attractive relative to solar. The farther from Earth, the more attractive extracting local resources becomes. Momentum transfer tethers are nice for ge...
hanelyp Real Space 2 5,581 10-19-2015, 12:49 PM
    Thread: Dyson swarm spotted?
Post: RE: Dyson swarm spotted?

Looking at the Discovery.com article, making the assumption that the earlier isolated transit is a single circular object in the neighborhood of the star, a 15% dimming comes to an object ~39% of the ...
hanelyp Community Chatter 2 7,027 10-14-2015, 06:45 PM
    Thread: Dyson swarm spotted?
Post: Dyson swarm spotted?

I'm not sure how credible this is... Quote:A series of mysterious objects surrounding a giant star millions of miles away could be an alien megastructure, experts believe. Planet spotters examining d...
hanelyp Community Chatter 2 7,027 10-14-2015, 10:47 AM
    Thread: talk-polywell
Post: talk-polywell

Joe, would you have need for a php / phpbb expert? My services are available to get that site back online.
hanelyp Community Chatter 1 4,596 10-10-2015, 11:28 AM
    Thread: How to get great viewing at 1G?
Post: RE: How to get great viewing at 1G?

Radiation isn't the only threat to a window. There are also micro-meteoroids of various descriptions. Both can be addressed while still letting in light, and possibly allowing a view, by an optical ...
hanelyp Real Space 12 20,201 10-03-2015, 11:31 AM
    Thread: cosmic ray protection from Martian atmosphere? ...Nope
Post: RE: cosmic ray protection from Martian atmosphere?...

The long term effect of fractional G is a point where we really don't have enough data.
hanelyp Real Space 17 29,413 09-30-2015, 10:14 PM
    Thread: Flight in faux gravity haitats.
Post: RE: Flight in faux gravity haitats.

Air in a spinning canister will tend to spin with the canister. So even if you manage to kill your velocity relative to the hub, if you're off center air drag will tend to give you some velocity that...
hanelyp Community Chatter 5 10,818 09-27-2015, 09:38 PM
    Thread: Interesting Orbits Throughout the Solar System
Post: RE: Interesting Orbits Throughout the Solar System

Other orbits of interest around Mars: - Communication satellites in a horseshoe orbit with Phobos. - Transfer orbits to and from tethers anchored to Phobos.
hanelyp Real Space 16 30,396 09-23-2015, 10:38 AM
    Thread: Windows without mirrors
Post: RE: Windows without mirrors

Still water over windows does nothing to help with sediment. Flowing water could be part of a cleaning system.
hanelyp Dev Log 7 12,838 09-23-2015, 10:11 AM
    Thread: Getting a grip on water use
Post: RE: Getting a grip on water use

You may need condenser units to remove water from the air. I'm also thinking you'll need coolers to dispose of all the heat introduced lighting the place and running various hardware. Place the cool...
hanelyp Dev Log 9 17,549 09-21-2015, 07:46 PM
    Thread: Orbital Space Colonies and Geometry Primitives
Post: RE: Orbital Space Colonies and Geometry Primitives

Note that the cylinders are operated in counter-rotating pairs to counter the instability of rotating on their long axis.
hanelyp Real Space 2 6,056 09-17-2015, 02:06 PM