- sun
- 4.2× wider
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
Kepler-129 c
Kepler-129 c is a confirmed sub-Neptune exoplanet 1,333 ly from Earth in the constellation Draco, discovered in 2014 by Kepler.
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it (what that means).
Its yellow, Sun-like star looks 4.2× wider than ours, bathing the surface in warm white light. A year passes in just 82 days, and at an estimated 252°C (485°F) it is blistering.
Catalog values (NASA Exoplanet Archive): mass 43.00 M⊕, radius 2.52 R⊕. Its catalog mass and radius imply a density of 14.8 g/cm³, denser than compressed iron, so they cannot both be right, and gravityfinder does not use Kepler-129 c in gravity rankings or weight calculations.
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
Hear how a voice sounds herea computed acoustic demoEXPERIMENTAL · just for fun
Your voice would sound high and thin, almost cartoonish.
Assuming Earth-like air at this world's temperature of about 252°C (485°F), sound would travel roughly 35% 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.
- !Blistering at about 252°C (485°F), far too hot for liquid water on the surface.
A playful read of Kepler-129 c’s measured and computed values, not a real advisory.
How long to get there · 1,333 ly awayCALCULATED
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.
How far is Kepler-129 c from Earth?
Kepler-129 c lies about 1,333 light-years from Earth.
How long would it take to get to Kepler-129 c?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 2.1 million years.
How hot is Kepler-129 c?
Kepler-129 c's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 252°C (485°F).
How long is a year on Kepler-129 c?
Kepler-129 c completes one orbit of its star in 82 days.
Illustration generated from Kepler-129 c's confirmed parameters, not a photograph.