- weight
- ≥ 1.28 g
- sun
- 7.4× wider
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
HD 20794 b
HD 20794 b is a confirmed rocky exoplanet 19.6 ly from Earth in the constellation Eridanus, discovered in 2011 by La Silla Observatory.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Standing on HD 20794 b, you would weigh roughly about 28% more than you do on Earth. Its yellow, Sun-like star looks 7.4× 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 18 days, and at an estimated 387°C (728°F) it is blistering.
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 1.3 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 high and thin, almost cartoonish.
Assuming Earth-like air at this world's temperature of about 387°C (728°F), sound would travel roughly 51% 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 387°C (728°F), far too hot for liquid water on the surface.
- Surface gravity is close to Earth's, at least 1.28 times, so you would move much as you do here.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of HD 20794 b’s measured and computed values, not a real advisory.
How long to get there · 19.6 ly away
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
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What is the gravity on HD 20794 b?
HD 20794 b's surface gravity is at least 1.3 times Earth's, and possibly more: its mass is only a lower bound.
How much would you weigh on HD 20794 b?
Someone who weighs 150 pounds on Earth would weigh at least 193 pounds on HD 20794 b.
How far is HD 20794 b from Earth?
HD 20794 b lies about 19.6 light-years from Earth.
How long would it take to get to HD 20794 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 30,535 years.
How hot is HD 20794 b?
HD 20794 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 387°C (728°F).
How long is a year on HD 20794 b?
HD 20794 b completes one orbit of its star in 18 days.
Illustration generated from HD 20794 b's confirmed parameters, not a photograph.