- weight
- 1.51 g
- sun
- 6.5× wider
- sky
- dim red
Illustration computed from this world’s measured and derived values, not a photograph.
TOI-2120 b
TOI-2120 b is a confirmed sub-Neptune exoplanet 105 ly from Earth in the constellation Cassiopeia, 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 TOI-2120 b, you would weigh about 51% more than you do on Earth. Its red dwarf looks 6.5× wider than ours, bathing the surface in dim red 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 5.8 days, and at an estimated 111°C (232°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
A little heavier than home, at 1.5 times Earth's gravity. A child raised here would likely grow a little shorter and sturdier than their Earth-raised parents, about 0.92x as tall as on Earth: a 5 ft 10 in adult could stand nearer 5 ft 5 in, with denser bones.
- Bones
- Thick and dense
- More weight to bear forces the skeleton to grow denser and stronger all through childhood.
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 noticeably higher and reedier.
Assuming Earth-like air at this world's temperature of about 111°C (232°F), sound would travel roughly 15% faster than on Earth, so your voice would sound noticeably higher and reedier. 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.
- !Persistently hot at around 111°C (232°F), well above anything you would call comfortable.
- !Noticeably heavy, 1.5 times Earth's gravity.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of TOI-2120 b’s measured and computed values, not a real advisory.
How long to get there · 105 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 TOI-2120 b?
TOI-2120 b's surface gravity is about 1.5 times Earth's.
How much would you weigh on TOI-2120 b?
Someone who weighs 150 pounds on Earth would weigh about 227 pounds on TOI-2120 b.
How far is TOI-2120 b from Earth?
TOI-2120 b lies about 105 light-years from Earth.
How long would it take to get to TOI-2120 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 163,669 years.
How hot is TOI-2120 b?
TOI-2120 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 111°C (232°F).
How long is a year on TOI-2120 b?
TOI-2120 b completes one orbit of its star in 5.8 days.
Illustration generated from TOI-2120 b's confirmed parameters, not a photograph.