What it’s like to stand here
GJ 436 b
weight
1.27 g
sun
15.6× wider
sky
deep orange

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

Ice / gas giant

GJ 436 b

Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.

GJ 436
host star
4.17 R⊕
radius
22.10 M⊕
mass · measured
2.6 days
orbital period
413°C (775°F)
avg temp
What it's like to stand here
1.27 g
surface gravity (no solid surface · measured mass)
2.6 days
one year, in Earth time
15.6× wider
how big its sun looks vs ours
deep orange
midday sky tint
0.8×
how high you could jump vs Earth
likely
likely tidally locked: probably eternal day on one side, night on the other
How long to get there · 31.8 ly away
Jet airliner
38.1 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
49,612 years
dies en route1000-yr cryo: fails
Light speed
32 years
arrives elderly
Warp 10
12 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthGJ 436 b is 4.2× the width of Earth
Explore from here · roam the neighborhood
Host star
GJ 436
M2.5 V · 1 planet
Explore →
Sibling worlds in this system

No other confirmed planets here yet. New ones auto-appear as telescopes report.

Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.

Can you see it tonight? · observe
SMALL TELESCOPE NEEDED
Host-star brightnessmag 10.7
ConstellationLeo
To see the host star4-6" (100-150 mm) telescope
Gear bridge

Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.

Illustration generated from GJ 436 b's confirmed parameters, not a photograph.