- weight
- ≥ 0.58 g
- sun
- 8.1× wider
- sky
- dim red
Illustration computed from this world’s measured and derived values, not a photograph.
Barnard b
Barnard b is a confirmed rocky exoplanet 6.0 ly from Earth in the constellation Ophiuchus, discovered in 2024 by Paranal Observatory.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Standing on Barnard b, you would weigh roughly about 42% less than you do on Earth. Its red dwarf looks 8.1× 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 3.2 days, and at an estimated 165°C (329°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
Lighter than home, at about 0.58 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 6 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 noticeably higher and reedier.
Assuming Earth-like air at this world's temperature of about 165°C (329°F), sound would travel roughly 23% faster than on Earth, so your voice would sound noticeably higher and reedier. 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.
- !Persistently hot at around 165°C (329°F), well above anything you would call comfortable.
- !Low gravity, at least 0.58 times Earth's, would hold only a thin, unbreathable atmosphere at best.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of Barnard b’s measured and computed values, not a real advisory.
How long to get there · 6.0 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 Barnard b?
Barnard b's surface gravity is at least 0.58 times Earth's, and possibly more: its mass is only a lower bound.
How much would you weigh on Barnard b?
Someone who weighs 150 pounds on Earth would weigh at least 87 pounds on Barnard b.
How far is Barnard b from Earth?
Barnard b lies about 6.0 light-years from Earth.
How long would it take to get to Barnard b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 9,291 years.
How hot is Barnard b?
Barnard b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 165°C (329°F).
How long is a year on Barnard b?
Barnard b completes one orbit of its star in 3.2 days.
Illustration generated from Barnard b's confirmed parameters, not a photograph.