- weight
- ≈ 0.82 g
- sun
- 1.8× wider
- sky
- deep orange
Illustration computed from this world’s measured and derived values, not a photograph.
Kepler-1628 b
Kepler-1628 b is a confirmed Neptune-like exoplanet 1,148 ly from Earth in the constellation Lyra, discovered in 2016 by Kepler.
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
Kepler-1628 b is a giant ball of gas with no solid surface to stand on; you would simply sink into ever-thicker cloud. Its orange dwarf looks 1.8× wider than ours, bathing the cloud tops in deep orange light. A year passes in just 76 days, and at an estimated -33°C (-28°F) it is cold.
How closely this world matches Earth in size and warmth, from 0 to 1 (Earth = 1.0). Computed by gravityfinder. See every world ranked →
What these mean: surface gravity · tidal locking · equilibrium temperature · Earth similarity · habitable zone
If your children grew up herea playful thought experiment
There is no ground here to grow up on, only bottomless sky. A child could never stand, walk, or even fall to a surface, because there isn't one. Under about 0.8 times Earth's gravity and pressure that only climbs the deeper you go, anything built for this world would not look human at all: picture something closer to a deep-sea creature than a person, broad and buoyant, drifting through the cloud decks with no need for legs and no floor to land on.
- Body plan
- Floating, not upright
- With no surface and no fixed up or down, a skeleton built for standing would be useless; a drifting, gas-filled body would not.
- Build
- Broad and pressure-hardened
- Pressure rises without limit toward the interior, so anything alive would have to be built like a deep-sea animal, not a land one.
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 a thin, helium-fast squeak.
There is no surface to stand on; this is the sound at the cloud tops, where the air is mostly hydrogen and helium, the lightest gases there are. Sound races through them at about 1,102 metres per second, 3.2 times its Earth speed, flipping a voice into a thin, cartoon-helium squeak. The temperature behind that number is this world's computed equilibrium temperature; its real atmosphere is unknown. The demo plays the shift capped at 1.8x; the real effect would be even stronger.
A real voice sample, pitch-shifted (tempo held constant) to suggest the acoustics: a playful approximation, not a precise simulation. Voice: Lingua Libre / Vealhurl, CC BY-SA 4.0.
- Surface temperatures near -33°C (-28°F) fall in the range where liquid water is at least possible.
- !There is nowhere to land: no ground, no deck, only cloud that thickens into crushing pressure.
- It orbits within the habitable zone, where a world could in principle hold liquid water.
A playful read of Kepler-1628 b’s measured and computed values, not a real advisory.
How long to get there · 1,148 ly away
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.
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What is the gravity on Kepler-1628 b?
Kepler-1628 b is a gas giant with no solid surface to stand on. At its cloud tops, gravity pulls about 0.82 times as hard as Earth's.
How far is Kepler-1628 b from Earth?
Kepler-1628 b lies about 1,148 light-years from Earth.
How long would it take to get to Kepler-1628 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 1.8 million years.
How hot is Kepler-1628 b?
Kepler-1628 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about -33°C (-28°F).
Is Kepler-1628 b habitable?
Kepler-1628 b orbits inside its star's habitable zone, the range of distances where liquid water could be stable, and its Earth-similarity index is 0.49. That makes it worth studying, but it is not evidence of life: we have no measurement of its atmosphere, water, or surface.
How long is a year on Kepler-1628 b?
Kepler-1628 b completes one orbit of its star in 76 days.
Illustration generated from Kepler-1628 b's confirmed parameters, not a photograph.