What it’s like to stand here
KELT-21 b
- weight
- 3.93 g
- sun
- 31.1× wider
- sky
- blue-white
Illustration computed from this world’s measured and derived values, not a photograph.
Gas giant
KELT-21 b
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
KELT-21 →
host star
17.78 R⊕
radius
1,243 M⊕
mass · measured
3.6 days
orbital period
1778°C (3232°F)
avg temp
What it's like to stand here
3.93 g
surface gravity (no solid surface · measured mass)
3.6 days
one year, in Earth time
31.1× wider
how big its sun looks vs ours
blue-white
midday sky tint
0.3×
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 · 1,536 ly away
Jet airliner
1.8 billion years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
2.4 million years
dies en route1000-yr cryo: fails
Light speed
1,536 years
dies en route1000-yr cryo: fails
Warp 10
2 years
arrives, just older
Folding spacetime
instant
arrives thriving
Size vs Earth
Explore from here · roam the neighborhood
Host star
KELT-21
A8 V · 1 planet
Sibling worlds in this system
No other confirmed planets here yet. New ones auto-appear as telescopes report.
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
SMALL TELESCOPE NEEDED
Gear bridge
Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.
Illustration generated from KELT-21 b's confirmed parameters, not a photograph.