What it’s like to stand here
NN Ser d
weight
4.10 g
sky
icy blue-white

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

Gas giant

NN Ser d

1,682 lyDiscovered in 2010 by Multiple ObservatoriesDisputed detection

Eclipse Timing Variations: inferred from shifts in the timing of its eclipsing stars.

NN Ser →
host star
13.30 R⊕
radius
725 M⊕
mass · measured
7.9 years
orbital period
–
avg temp
What it's like to stand here
4.10 g
surface gravity (no solid surface · measured mass)
7.9 years
one year, in Earth time
–
sun size, needs orbit
icy blue-white
midday sky tint
0.2×
how high you could jump vs Earth
normal
day/night cycle (not tidally locked)
How long to get there · 1,682 ly away
Jet airliner
2.0 billion years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
2.6 million years
dies en route1000-yr cryo: fails
Light speed
1,682 years
dies en route1000-yr cryo: fails
Warp 10
2 years
arrives, just older
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthNN Ser d is 13× the width of Earth
Explore from here · roam the neighborhood
NN Ser dGas giant
PlanetNN Ser cGas giant
PlanetNN Ser csimilar world
SystemBD+15 2940300 ly
Sky regionSerpensthis direction
Host star
Binary system
NN Ser
WD · 2 planets
Explore →
Sibling worlds in this system
Nearby star systems
Similar worlds (size · gravity · star)

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 16.9
ConstellationSerpens →
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 NN Ser d's confirmed parameters, not a photograph.