Jumpgate Status: Primary hub, heavily regulated

Government: United Earth Government (UEG)

Star Type: G2V main‑sequence star

Color: Yellow

Luminosity: 1.0 L☉

Behavior

· Low to moderate flare activity

· Stable long-term luminosity

· Predictable solar cycles

· Occasional strong coronal mass ejections

· Drives Earth’s climate and Mars’s atmospheric loss

· Safe for long-term human habitation across multiple worlds

Planets

Mercury

Type: Hot rocky dwarf

Atmosphere: None Use:

· Automated mining

· Solar research stations

· Extreme‑environment testing grounds

Venus

Type: Runaway greenhouse terrestrial

Atmosphere: Dense CO₂, sulfuric acid clouds

Use:

· Atmospheric probes

· Floating research platforms

· No permanent human presence

· Under consideration for future terraforming

Earth

Type: Temperate terrestrial

Atmosphere: Nitrogen‑oxygen

Surface: Continents, oceans

Use:

· Cultural, political, and diplomatic center

· Primary destination for alien visitors

· Largest multi-species hub in the Sol system

Mars

Type: Cold desert terrestrial

Atmosphere: Thin CO₂

Surface: Red deserts, polar ice, lava tubes

Human Activity

· Largest human settlement outside Earth

· Multi‑city arcologies connected by maglev tunnels

· Terraforming research zones

· Massive underground habitats in lava tubes

· Independent political identity emerging

· Few alien visitors (most prefer Earth’s biosphere and cultural centers)

Cultural Notes

· Martian identity is proud, frontier‑driven

· Strong engineering and scientific culture

· Tension with Earth over autonomy and resource rights

Asteroid Belt

Type: Dense debris field Use:

· Mining colonies

· Shipyards

· Independent habitats

· Pirate activity

Jupiter

Type: Massive gas giant

Atmosphere: Hydrogen‑helium

Use:

· Helium‑3 harvesting

· Orbital research stations

· Jovian moon colonies (see below)

Major Moons

· Europa: Subsurface ocean research

· Ganymede: Industrial colony

· Callisto: Outer‑system logistics hub

· Io: Volcanic research, hazardous zone; terraformed and has some colonies living on the surface; used for mining and technology as well.

Saturn

Type: Ringed gas giant Use:

· Helium‑3 extraction

· Ring mining

· Scientific stations

Major Moons

· Titan: Large colony with domed cities

· Enceladus: Cryovolcanic research

· Rhea/Dione: Small outposts

Uranus

Type: Methane‑rich ice giant

Use:

· Outer‑system astronomy

· Deep‑space relay stations

Neptune

Type: Cold methane‑rich giant

Use:

· Outer‑system research

· Gateway to Kuiper Belt operations

Kuiper Belt

Type: Icy debris field Use:

· Long-range telescopes

· Deep‑space shipyards

· Alien embassies who prefer isolation

Oort Cloud

Type: Distant cometary halo

Use:

· Early-warning system for incoming objects

· Deep‑space listening posts

Infrastructure

Earth Orbit

· SolarisNet Relay Ring: Global communication backbone

· Orbital Homes: Luxury habitats

· Alien Embassies: Most alien species prefer Earth

Mars Orbit

· Gateway Port: Largest interplanetary port

Asteroid Belt

· Lonesome Freeport: Independent trade hub

· New Haven Shipyards: Heavy construction

· Williamsburg Research Array: Dark‑matter experiments

Jupiter Orbit

· Galilean Research Network: Linked stations around the major moons

· Europa Ocean Penetrator: Subsurface exploration

Saturn Orbit

· Ring Harvester Platforms: Mining ice and volatiles

· Titan Dome Cities: Thick‑atmosphere settlements

Outer System

· Uranus Polar Array: Deep‑space telescope

· Neptune Triton Colony: Cryogenic research

· Kuiper Belt Listening Posts: Alien-friendly outposts

© 2025-2026 by Beverly L. Anderson and J. Foster. All rights reserved.
Email bev@beverlylanderson for permissions to write in this universe.
There is no use without written permission.