- weight
- 0.38 g
- sun
- 0.66× as wide
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
Mars
Mars is a rocky world in our own solar system.
Standing on Mars, you would weigh about 62% less than you do on Earth. From here the Sun looks 0.66× as wide as it does from Earth, bathing the surface in warm white light. A year here lasts 1.9 Earth years, and it sits squarely in the habitable zone, among the more Earth-like worlds known.
How closely this world matches Earth in size and warmth, from 0 to 1 (Earth = 1.0). Computed by gravityfinder. See every world ranked →
What these mean: surface gravity · tidal locking · equilibrium temperature · Earth similarity · habitable zone
If your children grew up herea playful thought experiment
Low gravity, 0.38 times Earth's. A child who grew up here could become strikingly tall and lightly built, about 1.2x taller than on Earth: a 5 ft 10 in adult could stand nearer 7 ft 1 in, with long limbs and slender bones.
- 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
Your voice would sound deep and slow, dropped to a low bass.
Sound travels at about 229 metres per second here, roughly 33% slower than on Earth, so your voice would sound deep and slow, dropped to a low bass. The air is so thin that words would barely carry, faint and muffled even up close.
A real voice sample, pitch-shifted (tempo held constant) to suggest the acoustics: a playful approximation, not a precise simulation. Voice: Lingua Libre / Vealhurl, CC BY-SA 4.0.
- The most realistic destination beyond Earth, which is exactly why agencies are planning crewed missions to it.
- !Bitterly cold, averaging about -60°C, under a thin carbon-dioxide atmosphere you could not breathe.
- !Gravity is about a third of Earth's, and the surface gets little shelter from radiation.
A playful read of Mars’s measured and computed values, not a real advisory.
Mars is in our own solar system. It orbits about 1.52 AU from the Sun, so sunlight reaches it in roughly 13 minutes. From Earth it is about 0.52 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 Mars would take about 5 days; a real mission with crew aboard is planned around 7 to 9 months one way with today's rockets.
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.
What is the gravity on Mars?
Mars's surface gravity is about 0.38 times Earth's.
How much would you weigh on Mars?
Someone who weighs 150 pounds on Earth would weigh about 57 pounds on Mars.
How hot is Mars?
Mars's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about -63°C (-82°F).
How long is a year on Mars?
Mars completes one orbit of the Sun in 1.9 years.
The portrait of Mars is a real photograph (NASA / USGS, Public domain). The "stand here" scene and the size comparison are computed illustrations, not photographs.