- weight
- 0.68 g
- sun
- 3.0× wider
- sky
- deep orange
Illustration computed from this world’s measured and derived values, not a photograph.
Kepler-138 e
Kepler-138 e is a confirmed rocky exoplanet 218 ly from Earth in the constellation Lyra, discovered in 2022 by Multiple Observatories.
Transit Timing Variations: inferred from the gravitational tug it puts on a sibling planet’s transit timing.
Standing on Kepler-138 e, you would weigh about 32% less than you do on Earth. Its orange dwarf looks 3.0× wider than ours, bathing the surface in deep 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 38 days, and at an estimated 19°C (66°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
Lighter than home, at 0.68 times Earth's gravity. A child raised here would likely grow taller and more slender than their Earth-raised parents, about 1.1x taller than on Earth: a 5 ft 10 in adult could stand nearer 6 ft 4 in.
- 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.
- 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 much as it does on Earth.
Assuming Earth-like air at this world's temperature of about 19°C (66°F), sound would travel close to its Earth speed, so your voice would sound much as it does on Earth. The real atmosphere is unknown.
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.
- Surface temperatures near 19°C (66°F) fall in the range where liquid water is at least possible.
- !Low gravity, 0.68 times Earth's, would hold only a thin, unbreathable atmosphere at best.
- A high Earth-similarity index of 0.85, among the more Earth-like worlds known.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of Kepler-138 e’s measured and computed values, not a real advisory.
How long to get there · 218 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 Kepler-138 e?
Kepler-138 e's surface gravity is about 0.68 times Earth's.
How much would you weigh on Kepler-138 e?
Someone who weighs 150 pounds on Earth would weigh about 102 pounds on Kepler-138 e.
How far is Kepler-138 e from Earth?
Kepler-138 e lies about 218 light-years from Earth.
How long would it take to get to Kepler-138 e?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 340,113 years.
How hot is Kepler-138 e?
Kepler-138 e's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 19°C (66°F).
How long is a year on Kepler-138 e?
Kepler-138 e completes one orbit of its star in 38 days.
Illustration generated from Kepler-138 e's confirmed parameters, not a photograph.