- weight
- ≈ 0.94 g
- sun
- 8.2× wider
- sky
- deep orange
Illustration computed from this world’s measured and derived values, not a photograph.
LHS 1678 d
LHS 1678 d is a confirmed rocky exoplanet 64.8 ly from Earth in the constellation Caelum, discovered in 2024 by Transiting Exoplanet Survey Satellite (TESS).
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
Standing on LHS 1678 d, you would weigh roughly about 6% less than you do on Earth. Its red dwarf looks 8.2× 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 5.0 days, and at an estimated 190°C (374°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 0.94 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 190°C (374°F), sound would travel roughly 27% 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 190°C (374°F), far too hot for liquid water on the surface.
- Surface gravity is close to Earth's, about 0.94 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 LHS 1678 d’s measured and computed values, not a real advisory.
How long to get there · 64.8 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 1678 d?
LHS 1678 d's surface gravity is about 0.94 times Earth's, estimated from its size.
How much would you weigh on LHS 1678 d?
Someone who weighs 150 pounds on Earth would weigh about 141 pounds on LHS 1678 d.
How far is LHS 1678 d from Earth?
LHS 1678 d lies about 64.8 light-years from Earth.
How long would it take to get to LHS 1678 d?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 101,116 years.
How hot is LHS 1678 d?
LHS 1678 d's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 190°C (374°F).
How long is a year on LHS 1678 d?
LHS 1678 d completes one orbit of its star in 5.0 days.
Illustration generated from LHS 1678 d's confirmed parameters, not a photograph.