What it’s like to stand here

PSR B1257+12 d

weight: 1.20 g

Illustration computed from this world’s measured and derived values, not a photograph.

PSR B1257+12 d

PSR B1257+12 d is a confirmed sub-Neptune exoplanet 1,957 ly from Earth in the constellation Virgo, discovered in 1992 by Arecibo Observatory.

1,957 lyDiscovered in 1992 by Arecibo Observatory

Pulsar Timing: spotted by tiny shifts in the steady beat of its host pulsar.

PSR B1257+12 →

host star

1.80 R⊕

radius

3.90 M⊕

mass · measured

98 days

orbital period

–

avg temp

Human scale

Standing on PSR B1257+12 d, you would weigh about 20% more than you do on Earth. A year passes in just 98 days.

1.20 g

your weight (measured mass)

98 days

one year, in Earth time

–

sun size, needs orbit

–

sky color, needs star temp

0.8×

how high you could jump vs Earth

normal

day/night cycle (not tidally locked)

Calculate your exact weight on PSR B1257+12 d →

What these mean: surface gravity · tidal locking · equilibrium temperature

If your children grew up herea playful thought experiment

much like Earth height

Gravity close to Earth's, at 1.2 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 much as it does on Earth.

We do not yet have a temperature for this world, and its atmosphere is unknown, so its acoustics cannot be modelled. In Earth-like air a human voice carries as you know it, and without the temperature that is as far as the physics will take us.

The journey

Cosmic travel advisory

★★★★☆

Recommended, with reservations