- weight
- 1.10 g
- sun
- 4.0× wider
- sky
- deep orange
Illustration computed from this world’s measured and derived values, not a photograph.
Gliese 12 b
Gliese 12 b is a confirmed rocky exoplanet 39.8 ly from Earth in the constellation Pisces, discovered in 2024 by Transiting Exoplanet Survey Satellite (TESS).
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
Standing on Gliese 12 b, you would weigh about 10% more than you do on Earth. Its red dwarf looks 4.0× wider than ours, bathing the surface in deep orange light. It is likely tidally locked, so that sun never moves in the sky: one hemisphere in endless day, the other in permanent night. A year passes in just 13 days, and at an estimated 41°C (107°F) it is warm.
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 1.1 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 much as it does on Earth.
Assuming Earth-like air at this world's temperature of about 41°C (107°F), sound would travel roughly 5% faster than on Earth, so your voice would sound much as it does on Earth. 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.
- Surface temperatures near 41°C (107°F) fall in the range where liquid water is at least possible.
- Surface gravity is close to Earth's, 1.10 times, so you would move much as you do here.
- A high Earth-similarity index of 0.83, among the more Earth-like worlds known.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of Gliese 12 b’s measured and computed values, not a real advisory.
How long to get there · 39.8 ly away
No other confirmed planets here yet. New ones auto-appear as telescopes report.
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 Gliese 12 b?
Gliese 12 b's surface gravity is about 1.1 times Earth's.
How much would you weigh on Gliese 12 b?
Someone who weighs 150 pounds on Earth would weigh about 165 pounds on Gliese 12 b.
How far is Gliese 12 b from Earth?
Gliese 12 b lies about 39.8 light-years from Earth.
How long would it take to get to Gliese 12 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 62,109 years.
How hot is Gliese 12 b?
Gliese 12 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 41°C (107°F).
How long is a year on Gliese 12 b?
Gliese 12 b completes one orbit of its star in 13 days.
Illustration generated from Gliese 12 b's confirmed parameters, not a photograph.