What it’s like to stand here

LkCa 15 b

sun: 0.11× as wide
sky: amber-orange

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

LkCa 15 b

LkCa 15 b is a confirmed sub-Neptune exoplanet 516 ly from Earth in the constellation Taurus, discovered in 2015 by Large Binocular Telescope Observatory.

516 lyDiscovered in 2015 by Large Binocular Telescope ObservatoryDisputed detection

Imaging: photographed directly, as a faint point of light beside its star.

LkCa 15 →

host star

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radius

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mass · minimum (m·sin i)

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orbital period

-206°C (-339°F)

avg temp

Human scale

Its orange dwarf looks 0.11× as wide as ours, bathing the surface in amber-orange light. At an estimated -206°C (-339°F) it is colder than almost anywhere in the solar system.

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gravity, needs mass + radius

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one year, in Earth time

0.11× as wide

how big its sun looks vs ours

amber-orange

midday sky tint

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jump, needs gravity

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rotation unknown

What these mean: surface gravity · tidal locking · equilibrium temperature

Hear how a voice sounds herea computed acoustic demo

Your voice would sound deep and slow, dropped to a low bass.

Assuming Earth-like air at this world's temperature of about -206°C (-339°F), sound would travel roughly 52% slower than on Earth, so your voice would sound deep and slow, dropped to a low bass. The real atmosphere is unknown, so this is a best guess.

sound speed ≈ 164 m/s · 0.48× Earth · assumes Earth-like air

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.

The journey

Cosmic travel advisory

★☆☆☆☆

Do not travel