- weight
- 0.43 g
- sun
- 10.7× wider
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
TOI-451 c
TOI-451 c is a confirmed sub-Neptune exoplanet 404 ly from Earth in the constellation Eridanus, discovered in 2020 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-451 c, you would weigh about 57% less than you do on Earth. Its yellow, Sun-like star looks 10.7× wider than ours, bathing the surface in warm white 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 9.2 days, and at an estimated 592°C (1097°F) it is furnace-hot.
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
Low gravity, 0.43 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 6 ft 11 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 high and thin, almost cartoonish.
Assuming Earth-like air at this world's temperature of about 592°C (1097°F), sound would travel roughly 73% faster than on Earth, so your voice would sound high and thin, almost cartoonish. 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.
- !Furnace-hot at around 592°C (1097°F), with no liquid water and no shade anywhere.
- !Low gravity, 0.43 times Earth's, would hold only a thin, unbreathable atmosphere at best.
- !Its star delivers about 93 times the sunlight Earth gets, a blinding, sterilizing glare.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of TOI-451 c’s measured and computed values, not a real advisory.
How long to get there · 404 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 TOI-451 c?
TOI-451 c's surface gravity is about 0.43 times Earth's.
How much would you weigh on TOI-451 c?
Someone who weighs 150 pounds on Earth would weigh about 65 pounds on TOI-451 c.
How far is TOI-451 c from Earth?
TOI-451 c lies about 404 light-years from Earth.
How long would it take to get to TOI-451 c?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 629,430 years.
How hot is TOI-451 c?
TOI-451 c's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 592°C (1097°F).
How long is a year on TOI-451 c?
TOI-451 c completes one orbit of its star in 9.2 days.
Illustration generated from TOI-451 c's confirmed parameters, not a photograph.