Talk:System Density

Notes (2017)

The density of the map (1 system per parsec) is a artifact of the mapping system used by Traveller. Using the size system based upon orbital distances (T5.09 p400) gives a maximum system size (orbit 20) of about 1 ly radius, or about 2 ly diameter. This means it's possible for two system to be in a single hex (150% to 200% density).

If you assume a slightly smaller system, limited to orbit 15, you can cram more than 17,000 systems into the area: area of a orbit 15 system is pi*(2500)^2 = 19,634,954 Au^2, where a parsec hex is about (pi*(103125^2) = 33,410,101,560 Au^2.

I think we can run the high end system density to several thousand per hex.

Tjoneslo (talk) 13:49, 22 July 2017 (EDT)

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How many can be mainworlds?

Is this from your personal research or inner circle work?

Could conventional life be possible with that dense a star distribution? Gamma ray bursts?

- Maksim-Smelchak (talk) 22:57, 22 July 2017 (EDT)

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By the way, all of that table is directly extrapolated from Marc's numbers in T5.

- Maksim-Smelchak (talk) 22:58, 22 July 2017 (EDT)

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To answer the direct question: All 17,000+ system have main worlds. Orbit 15 is Neptune's orbit, so large, well populated star system. In theory this many systems would probably loose their outer worlds as they moved passed each other or went into orbit around each other. There are some globular clusters with star densities this high (like the Wikipedia:Magellanic Clouds).

This was something I figured out by reading through your table. Since you extended it in the direction of the void, I thought I'd figure out what the top end of the scale was, and extrapolated in the other direction.

Stellar nurseries, like the Orion nebula, would well have 100-300% densities, but few or no worlds since they're in the process of forming.

Stellar Clusters, an evolution of the stellar nebula, would be 50% to 300% density.

Globular cluster, Wikipedia:Magellanic Clouds, could get into the 500% density.

Galactic core, also to the 500% (5 system per parsec) to 1000% (10 systems per parsec. Galactic core won't get any higher than this because of the giant black hole.

Globular cluster core, 100 systems per parsec or more.

Tjoneslo (talk) 08:31, 23 July 2017 (EDT)

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Very clever. Seems logical. As they say in Russian, Molodetz (brilliant or smashing).

That's why I put that information out.

- Maksim-Smelchak (talk) 10:07, 23 July 2017 (EDT)