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OrbitSpan

Human Scale

Pick a size for Earth. Every diameter and distance below is the real value multiplied by the same ratio (your Earth ÷ 12,742 km), recomputed from the current planetary positions — so the numbers shift as the planets move.

Simulation time (UTC)Mon, 09 Nov 2026 01:14:17 UTC

Positions are computed from a single canonical UTC timestamp. Your local timezone is never used for the astronomy.

Target & Inspect
Earth reference diameter

Approximate fist reference

Model Earth

10.00 cm

real 12,742 km

Scale factor

1 : 127,420,000

model length ÷ real length

Walk to model Sun

14 min

at a relaxed 1.4 m/s

Real-World Human Journey Benchmark

3D View

If you were to walk, drive, or fly through space at human speeds at this scale:

📍 New York City Walk

Sun: Times Square (Center Stage)
Earth: Central Park South / Plaza Hotel
Jupiter: Metropolitan Museum of Art (Met)
Neptune: Newark Liberty Airport / JFK Airport

📍 London Walk

Sun: Trafalgar Square (Nelson's Column)
Earth: Buckingham Palace gates
Jupiter: Tower of London / Tower Bridge
Neptune: London Heathrow Airport (LHR)

📍 Paris Walk

Sun: Eiffel Tower (Base Pillar)
Earth: Arc de Triomphe / Place Charles de Gaulle
Jupiter: Montmartre / Basilique du Sacré-Cœur
Neptune: Disneyland Paris / Marne-la-Vallée

📍 Tokyo Walk

Sun: Tokyo Station (Marunouchi Square)
Earth: Hibiya Park Fountain
Jupiter: Tokyo Tower main deck
Neptune: Yokohama Minato Mirai Landmark Tower

Measurement space

square-root spacing
Sun
Mercury
Venus
Moon
Mars
Jupiter
Saturn
Uranus
Neptune

A literal 3D world tens of kilometres wide cannot be rendered usefully, so model distances are shown as a measured scale space plus the distance cards below.

  • Sun

    Model diameter
    10.93 m
    Model distance from Earth
    1.16 km
    Real astronomical distance
    0.9907 AU
    Walking13m 57s
    100 km/h car42 sec

  • Mercury

    Model diameter
    3.83 cm
    Model distance from Earth
    842.02 m
    Real astronomical distance
    0.7172 AU
    Walking10m 6s
    100 km/h car30 sec

  • Venus

    Model diameter
    9.50 cm
    Model distance from Earth
    356.82 m
    Real astronomical distance
    0.3039 AU
    Walking4m 17s
    100 km/h car13 sec

  • Moon

    Model diameter
    2.73 cm
    Model distance from Earth
    3.12 m
    Real astronomical distance
    397,041 km
    Walking2 sec
    100 km/h car0 sec

  • Mars

    Model diameter
    5.32 cm
    Model distance from Earth
    1.6 km
    Real astronomical distance
    1.3662 AU
    Walking19m 14s
    100 km/h car58 sec

  • Jupiter

    Model diameter
    1.10 m
    Model distance from Earth
    6.31 km
    Real astronomical distance
    5.3762 AU
    Walking1h 16m
    100 km/h car3m 47s

  • Saturn

    Model diameter
    91.40 cm
    Model distance from Earth
    10.12 km
    Real astronomical distance
    8.6215 AU
    Walking2h 1m
    100 km/h car6m 4s

  • Uranus

    Model diameter
    39.81 cm
    Model distance from Earth
    21.71 km
    Real astronomical distance
    18.4879 AU
    Walking4h 20m
    100 km/h car13m 1s

  • Neptune

    Model diameter
    38.65 cm
    Model distance from Earth
    34.24 km
    Real astronomical distance
    29.1659 AU
    Walking6h 51m
    100 km/h car20m 33s

With a 10 cm Earth (roughly a clenched fist), the Moon sits about 3 m away, the Sun a little over 1 km, and the outer planets tens of kilometres out. Those figures are computed live from real ephemeris coordinates, so they shift continuously as the celestial bodies follow their orbits.