What it’s like to stand here

LkCa 15 c

sun: 0.09× as wide
sky: amber-orange

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

LkCa 15 c

LkCa 15 c 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

–

radius

–

mass · minimum (m·sin i)

–

orbital period

-214°C (-353°F)

avg temp

Human scale

Its orange dwarf looks 0.09× as wide as ours, bathing the surface in amber-orange light. At an estimated -214°C (-353°F) it is colder than almost anywhere in the solar system.

–

gravity, needs mass + radius

–

one year, in Earth time

0.09× as wide

how big its sun looks vs ours

amber-orange

midday sky tint

–

jump, needs gravity

–

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 -214°C (-353°F), sound would travel roughly 55% 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 ≈ 155 m/s · 0.45× 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