- weight
- 0.03 g
- sun
- 0.03× as wide
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
Charon
Charon is a rocky world in our own solar system.
Standing on Charon, you would weigh about 97% less than you do on Earth. From here the Sun looks 0.03× as wide as it does from Earth, bathing the surface in warm white light. A year here lasts 248 Earth years, and at an estimated -220°C (-364°F) it is colder than almost anywhere in the solar system.
If your children grew up herea playful thought experiment
Barely any weight to fight, at 0.03 times Earth's gravity. A child who grew up here could grow remarkably tall and willowy, about 2.0x taller than on Earth: a 5 ft 10 in adult could stand nearer 11 ft 10 in, with long thin limbs and delicate bones that never had to bear much load.
- Bones
- Light and slender
- With little weight to carry, the growing skeleton lays down far less bone, the way astronauts' bones thin in months of low gravity.
- Heart
- Unhurried
- With less weight pulling blood down toward the feet, the heart has far less work to do.
- Movement
- Bounding and springy
- So little weight means each step would carry the body up and forward in long, floating strides.
A playful thought experiment from this world’s gravity, not a prediction about any real person. No human has ever grown up off Earth, so no one truly knows; the direction (taller in low gravity, shorter and stockier in high) follows how growing bodies respond to weight.
Hear how a voice sounds herea computed acoustic demo
You would hear nothing at all.
With essentially no atmosphere, there is no medium to carry sound. You could shout into someone's helmet from an inch away and they would hear nothing: space is silent.
- !A cryogenic -220°C moon locked permanently face to face with Pluto.
- !No atmosphere, and far too little gravity to hold one.
- !Sunlight is so faint that high noon looks like deep twilight.
A playful read of Charon’s measured and computed values, not a real advisory.
Charon is in our own solar system. It orbits about 39.48 AU from the Sun, so sunlight reaches it in roughly 328 minutes. From Earth it is about 38.48 AU away at closest, and a spacecraft is far slower:
How long to get there with today’s craft
At the speed of the Parker Solar Probe, the fastest craft ever built, the trip to Charon would take about 346 days; a real mission took New Horizons nine and a half years to reach Pluto's neighborhood.
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.
The portrait of Charon is a real photograph (NASA/JHUAPL/SwRI, Public domain). The "stand here" scene and the size comparison are computed illustrations, not photographs.