Stellar

Communication keeps colonists alive

Off Earth, a leak, a dust storm, or a radiation spike can kill in minutes, and help may be minutes or years away at the speed of light. Stellar is built around that.

• 1. Reach helpMessage mission operators on every world. They answer emergencies in seconds on your own world and tell you exactly how long a reply from farther away will take.[ Open ]
• 2. Warn everyoneMark hazards, colonies, and resources on real NASA terrain. Every point of interest gets its own forum thread so others can confirm it.[ Open ]
• 3. Watch your bodyLog heart rate, oxygen, pressure, temperature, radiation, and supplies against real medical and NASA limits, then share a reading with a doctor or crewmate.[ Open ]
• 4. Know the waitSee the real light delay between any two places today, so you know whether help is seconds, minutes, or years away.[ Open ]
• 5. Stay connectedA live feed and planet forums so isolated crews can share what they see, ask for advice, and not feel alone.[ Open ]

How far is help right now?

Pick where you are and where help is. See how long a message takes today, and whether humans can survive there.

Calculating orbits...

Can humans live there?

Only Earth is livable outdoors. Everywhere else, people survive inside sealed, shielded habitats, so losing contact is dangerous.

• EarthLivable outdoorsBiggest danger: nothing special
• MoonOnly inside a sealed habitatBiggest danger: vacuum, two-week nights, sharp dust
• Orbital StationOnly inside a sealed habitatBiggest danger: leaks, fire, bone and muscle loss
• MarsOnly inside a sealed habitatBiggest danger: thin air, cold, dust storms, radiation
• CeresOnly inside a sealed habitatBiggest danger: vacuum, almost no gravity
• EuropaSurface deadly; possible under the iceBiggest danger: Jupiter's radiation belts
• GanymedeOnly inside a sealed habitatBiggest danger: radiation and extreme cold
• IoNot survivableBiggest danger: radiation and constant volcanoes
• TitanOnly inside a sealed habitatBiggest danger: extreme cold, no oxygen
• EnceladusOnly inside a sealed habitatBiggest danger: vacuum, cold, almost no gravity
• Kuiper BeltOnly aboard a shipBiggest danger: distance: help is hours away at light speed
• Proxima bUnknown: never visitedBiggest danger: stellar flares; one side may always face the star
• Alpha Centauri BUnknown: never visitedBiggest danger: distance: a message home takes 4.4 years