From Traveller Wiki - Science-Fiction Adventure in the Far future
Revision as of 08:05, 18 January 2019 by (Talk) (Description (Specifications))

Jump to: navigation, search
Comp-Prog-Dav-R-Deitrick-Starter-Trav-Page-16 16-July-2018a.jpg

A Nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

Description (Specifications)

Interstellar clouds are regions of gas, dust, and plasma that have a higher average density than the general interstellar medium. They are typically composed of about 70% hydrogen, the bulk of the remainder being helium with traces of other elements.

Basic Nebula Types

Interstellar clouds can be classified into 3 general types based on the primary form of hydrogen found within:

  1. Neutral Clouds (H I regions - formed of atomic hydrogen)
  2. Ionized Clouds (H II regions - formed of ionized hydrogen [i.e. "Plasma"])
  3. Molecular Clouds (Molecular Hydrogen - formed of H2)

Hydrostatic Equilibrium

Under normal circumstances interstellar clouds exist in a state of hydrostatic equilibrium, in which the natural self-gravitation that would otherwise cause the cloud to collapse is balanced by the outward pressure within the cloud due to motion of the atoms and molecules that compose it. Star formation is normally caused within molecular clouds by a triggering event which locally disturbs this equilibrium, causing runaway local collapsing regions within the cloud. Such causes can be the collision of one cloud with another, or the shock-wave within the interstellar medium caused by a nearby supernova explosion.

Selected Nebulae

No information yet available.

  1. TBD

History & Background (Dossier)

No information yet available.

Nebula Sizes

Nebulae are typically measured in the following units:

  • Astrographic hexes
  • Subsector
  • Sector
  • Multi-sector

Nebula Effects on Ships

No information yet available.

References & Contributors (Sources)

62px-Information icon.svg.png This article is missing content for one or more detailed sections. Additional details are required to complete the article. You can help the Traveller Wiki by expanding it.

This article was copied or excerpted from the following copyrighted sources and used under license from Far Future Enterprises or by permission of the author.