- weight
- 1.87 g
- sun
- 2.3× wider
- sky
- dim red
Illustration computed from this world’s measured and derived values, not a photograph.
LHS 1140 b
LHS 1140 b is a confirmed sub-Neptune exoplanet 48.9 ly from Earth in the constellation Cetus, discovered in 2017 by MEarth Project.
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
Standing on LHS 1140 b, you would weigh about 87% more than you do on Earth. Its red dwarf looks 2.3× wider than ours, bathing the surface in dim red 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 25 days, and it sits squarely in the habitable zone, among the more Earth-like worlds known.
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 · habitable zone
If your children grew up herea playful thought experiment
A little heavier than home, at 1.9 times Earth's gravity. A child raised here would likely grow a little shorter and sturdier than their Earth-raised parents, about 0.88x as tall as on Earth: a 5 ft 10 in adult could stand nearer 5 ft 2 in, with denser bones.
- Bones
- Thick and dense
- More weight to bear forces the skeleton to grow denser and stronger all through childhood.
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 deeper and fuller.
Assuming Earth-like air at this world's temperature of about -47°C (-53°F), sound would travel roughly 11% slower than on Earth, so your voice would sound deeper and fuller. 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.
- !Cold at about -47°C (-53°F), survivable only fully suited and heated.
- !Noticeably heavy, 1.9 times Earth's gravity.
- A high Earth-similarity index of 0.82, among the more Earth-like worlds known.
- It orbits within the habitable zone, where a world could in principle hold liquid water.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of LHS 1140 b’s measured and computed values, not a real advisory.
How long to get there · 48.9 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 LHS 1140 b?
LHS 1140 b's surface gravity is about 1.9 times Earth's.
How much would you weigh on LHS 1140 b?
Someone who weighs 150 pounds on Earth would weigh about 281 pounds on LHS 1140 b.
How far is LHS 1140 b from Earth?
LHS 1140 b lies about 48.9 light-years from Earth.
How long would it take to get to LHS 1140 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 76,231 years.
How hot is LHS 1140 b?
LHS 1140 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about -47°C (-53°F).
Is LHS 1140 b habitable?
LHS 1140 b orbits inside its star's habitable zone, the range of distances where liquid water could be stable, and its Earth-similarity index is 0.82. That makes it worth studying, but it is not evidence of life: we have no measurement of its atmosphere, water, or surface.
How long is a year on LHS 1140 b?
LHS 1140 b completes one orbit of its star in 25 days.
Illustration generated from LHS 1140 b's confirmed parameters, not a photograph.