- weight
- 2.27 g
- sun
- 59.5× wider
- sky
- amber-orange
Illustration computed from this world’s measured and derived values, not a photograph.
55 Cnc e
55 Cnc e is a confirmed sub-Neptune exoplanet 41.0 ly from Earth in the constellation Cancer, discovered in 2004 by McDonald Observatory.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Standing on 55 Cnc e, you would weigh about 127% more than you do on Earth. Its orange dwarf looks 59.5× wider than ours, bathing the surface in amber-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 17.7 hours, and at an estimated 1685°C (3065°F) it is hot enough to melt rock.
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
Heavier than home, at 2.3 times Earth's gravity. A child would end up markedly shorter and powerfully built, about 0.85x as tall as on Earth: a 5 ft 10 in adult could stand nearer 4 ft 11 in. Bones, muscle, and heart would all grow heavier just to stand and move.
- Bones
- Thick and dense
- More weight to bear forces the skeleton to grow denser and stronger all through childhood.
- Heart
- Large and powerful
- Pushing blood upward against stronger gravity demands a bigger, harder-working heart.
- Movement
- Low and deliberate
- A fall under this gravity lands hard, so movement stays slow, planted, and careful.
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 1685°C (3065°F), sound would travel roughly 161% 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.
- !At about 1685°C (3065°F), the daytime side glows: metals run liquid and any atmosphere is being torn away.
- !Noticeably heavy, 2.3 times Earth's gravity.
- !Its star delivers about 2,658 times the sunlight Earth gets, a blinding, sterilizing glare.
- !Earth-similarity index 0.11: this world has almost nothing in common with our own.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of 55 Cnc e’s measured and computed values, not a real advisory.
How long to get there · 41.0 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 55 Cnc e?
55 Cnc e's surface gravity is about 2.3 times Earth's.
How much would you weigh on 55 Cnc e?
Someone who weighs 150 pounds on Earth would weigh about 341 pounds on 55 Cnc e.
How far is 55 Cnc e from Earth?
55 Cnc e lies about 41.0 light-years from Earth.
How long would it take to get to 55 Cnc e?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 64,019 years.
How hot is 55 Cnc e?
55 Cnc e's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 1685°C (3065°F).
How long is a year on 55 Cnc e?
55 Cnc e completes one orbit of its star in 17.7 hours.
Illustration generated from 55 Cnc e's confirmed parameters, not a photograph.