SubJovian Type

SubJovians are primarily defined by their mass, which ranges from 0.3 to 0.7 that of Jupiter.

Like terrestrial worlds, there are a variety of reasons why these worlds formed with less mass, ranging from intense young stellar winds removing available planet-building materials to interference from a nearby forming EuJovian world.

While the atmospheres of these planets can be as active as their larger kin, often times they appear much more subdued to a global haze of hydrogen and ammonia.  Even so, great weather belts are visible from large distances.

Like nearly all Jovians, rings can be present and, indeed, are quite common.

The bland face of a SubJovian;  these clouds, however, hide a very dynamic planet.

ArcBuilder Europans


Orion's Arm

TV and Movies

Real Examples

References and Sources


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ArcBuilder Universe concept John M. and Margo L. Dollan 2002-2004
This Page first uploaded June 25, 2004
Most recent update for this page June 25, 2004