// Dwarf planet

Pluto

Distance from Earth right now

…

calculated live from orbital data (NASA/JPL)

Distance from Sun

39.48 AU (≈ 5.9 billion km)

Orbital period

≈ 248 years

Diameter

2,377 km

Moons

5 (incl. Charon)

Pluto was considered the ninth planet until 2006, when it was reclassified as a dwarf planet once it became clear the Kuiper Belt holds many similar objects. Its largest moon, Charon, is half Pluto's size — the two orbit a shared centre of gravity outside Pluto itself, which is why they're sometimes called a double dwarf planet. NASA's New Horizons probe flew past Pluto in 2015, the only mission to do so, and discovered the heart-shaped glacial plain Tombaugh Regio, among other features.

Orbital data: NASA/JPL Horizons. Photos: Wikimedia Commons.