- weight
- ≥ 1.04 g
- sun
- 1.2× wider
- sky
- deep orange
Illustration computed from this world’s measured and derived values, not a photograph.
GJ 229 A c
GJ 229 A c is a confirmed sub-Neptune exoplanet 18.8 ly from Earth in the constellation Lepus, discovered in 2020 by Multiple Facilities.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Standing on GJ 229 A c, you would weigh roughly about 4% more than you do on Earth. Its red dwarf looks 1.2× wider than ours, bathing the surface in deep orange light. A year passes in just 122 days, and at an estimated -85°C (-121°F) it is deeply frozen.
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
If your children grew up herea playful thought experiment
Gravity close to Earth's, at about 1.0 times. A child would grow up much as they would back home.
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 deeper and fuller.
Assuming Earth-like air at this world's temperature of about -85°C (-121°F), sound would travel roughly 19% slower than on Earth, so your voice would sound deeper and fuller. The real atmosphere is unknown, so this is a best guess.
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.
- !Cold at about -85°C (-121°F), survivable only fully suited and heated.
- Surface gravity is close to Earth's, at least 1.04 times, so you would move much as you do here.
A playful read of GJ 229 A c’s measured and computed values, not a real advisory.
How long to get there · 18.8 ly away
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 GJ 229 A c?
GJ 229 A c's surface gravity is at least 1.0 times Earth's, and possibly more: its mass is only a lower bound.
How much would you weigh on GJ 229 A c?
Someone who weighs 150 pounds on Earth would weigh at least 156 pounds on GJ 229 A c.
How far is GJ 229 A c from Earth?
GJ 229 A c lies about 18.8 light-years from Earth.
How long would it take to get to GJ 229 A c?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 29,281 years.
How hot is GJ 229 A c?
GJ 229 A c's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about -85°C (-121°F).
How long is a year on GJ 229 A c?
GJ 229 A c completes one orbit of its star in 122 days.
Illustration generated from GJ 229 A c's confirmed parameters, not a photograph.