What it’s like to stand here
TRAPPIST-1 d
weight
0.62 g
sun
5.4× wider
sky
dim red

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

Rocky world · likely temperate

TRAPPIST-1 d

Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.

TRAPPIST-1
host star
0.79 R⊕
radius
0.39 M⊕
mass · measured
4.0 days
orbital period
13°C (55°F)
avg temp
What it's like to stand here
0.62 g
your weight (measured mass)
4.0 days
one year, in Earth time
5.4× wider
how big its sun looks vs ours
dim red
midday sky tint
1.6×
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 · 40.5 ly away
Jet airliner
48.6 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
63,228 years
dies en route1000-yr cryo: fails
Light speed
41 years
arrives elderly
Warp 10
15 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthTRAPPIST-1 d is 1.3× narrower than Earth
Explore from here · roam the neighborhood
Host star
TRAPPIST-1
M8.0 V · 7 planets
Explore →

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

Can you see it tonight? · observe
FAINT — LARGE TELESCOPE NEEDED
Host-star brightnessmag 17.0
ConstellationAquarius
To see the host star10"+ (250 mm) telescope, dark sky
Gear bridge

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

Illustration generated from TRAPPIST-1 d's confirmed parameters, not a photograph.