- weight
- ≥ 1.08 g
- sun
- 1.2× wider
- sky
- amber-orange
Illustration computed from this world’s measured and derived values, not a photograph.
HD 40307 g
HD 40307 g is a confirmed sub-Neptune exoplanet 42.2 ly from Earth in the constellation Pictor, discovered in 2013 by La Silla Observatory.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Standing on HD 40307 g, you would weigh roughly about 8% more than you do on Earth. Its orange dwarf looks 1.2× wider than ours, bathing the surface in amber-orange light. A year passes in just 198 days, and it sits squarely in the habitable zone, among the more Earth-like worlds known.
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
Gravity close to Earth's, at about 1.1 times. A child would grow up much as they would back home.
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 much as it does on Earth.
Assuming Earth-like air at this world's temperature of about -18°C (-1°F), sound would travel roughly 6% slower than on Earth, so your voice would sound much as it does on Earth. The real atmosphere is unknown, so this is a best guess.
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 -18°C (-1°F) fall in the range where liquid water is at least possible.
- Surface gravity is close to Earth's, at least 1.08 times, so you would move much as you do here.
- It orbits within the habitable zone, where a world could in principle hold liquid water.
A playful read of HD 40307 g’s measured and computed values, not a real advisory.
How long to get there · 42.2 ly away
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 HD 40307 g?
HD 40307 g's surface gravity is at least 1.1 times Earth's, and possibly more: its mass is only a lower bound.
How much would you weigh on HD 40307 g?
Someone who weighs 150 pounds on Earth would weigh at least 163 pounds on HD 40307 g.
How far is HD 40307 g from Earth?
HD 40307 g lies about 42.2 light-years from Earth.
How long would it take to get to HD 40307 g?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 65,804 years.
How hot is HD 40307 g?
HD 40307 g's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about -18°C (-1°F).
Is HD 40307 g habitable?
HD 40307 g orbits inside its star's habitable zone, the range of distances where liquid water could be stable, and its Earth-similarity index is 0.76. 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 HD 40307 g?
HD 40307 g completes one orbit of its star in 198 days.
Illustration generated from HD 40307 g's confirmed parameters, not a photograph.