- sun
- 6.9× wider
- sky
- amber-orange
Illustration computed from this world’s measured and derived values, not a photograph.
HD 7924 c
HD 7924 c is a confirmed sub-Neptune exoplanet 55.4 ly from Earth in the constellation Cassiopeia, discovered in 2015 by W. M. Keck Observatory.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Its orange dwarf looks 6.9× wider than ours, bathing the surface in amber-orange light. It is likely tidally locked, so that sun never moves in the sky: one hemisphere in endless day, the other in permanent night. A year passes in just 15 days, and at an estimated 310°C (591°F) it is blistering.
What these mean: surface gravity · tidal locking · equilibrium temperature
Hear how a voice sounds herea computed acoustic demo
Your voice would sound high and thin, almost cartoonish.
Assuming Earth-like air at this world's temperature of about 310°C (591°F), sound would travel roughly 42% faster than on Earth, so your voice would sound high and thin, almost cartoonish. 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.
- !Blistering at about 310°C (591°F), far too hot for liquid water on the surface.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of HD 7924 c’s measured and computed values, not a real advisory.
How long to get there · 55.4 ly away
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
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How far is HD 7924 c from Earth?
HD 7924 c lies about 55.4 light-years from Earth.
How long would it take to get to HD 7924 c?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 86,435 years.
How hot is HD 7924 c?
HD 7924 c's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 310°C (591°F).
How long is a year on HD 7924 c?
HD 7924 c completes one orbit of its star in 15 days.
Illustration generated from HD 7924 c's confirmed parameters, not a photograph.