Small planets, the Moon and dwarf planets in our solar system have diameters from one to ten million metres. Top row: Mars (left), Mercury (right); bottom row: Moon (left), Pluto (center), and Haumea (right), to scale.

To help compare different orders of magnitude this page lists lengths starting at 10⁶ m (1 Mm or 1,000 km).

Distances shorter than 10⁶ metres

[edit] Conversions

1 megametre is equal to:

• 1 E+6 m (one million metres)
• approximately 621.37 miles
• Side of square with area 1,000,000 km²

[edit] Human-defined scales and structures

• 2.100 Mm — Length of proposed gas pipeline from Iran to India via Pakistan
• 2.288 Mm — Length of the official Alaska Highway when it was built in the 1940s^[1]
• 3.069 Mm — Length of Interstate 95 (from Houlton, Maine to Miami, Florida)
• 3.846 Mm — Length of U.S. Route 1 (from Fort Kent, Maine to Key West, Florida)
• 5.007 Mm — Estimated length of Interstate 90 (Seattle, Washington to Boston, Massachusetts)
• 5.614 Mm — Length of the Australian Dingo Fence^[2]
• 7.821 Mm — Length of the Trans-Canada Highway, the world's longest national highway (from Victoria, British Columbia to St. John's, Newfoundland)
• 8.852 Mm — Aggregate length of the Great Wall of China, including trenches, hills and rivers^[3]
• 9.259 Mm — Length of the Trans-Siberian railway^[4]

[edit] Sports

• 1.200 Mm — the length of the Paris-Brest-Paris bicycling event
• Several endurance auto races are run for 1,000 km:
  • 1000 km Brands Hatch
  • 1000 km Buenos Aires
  • 1000 km Donington
  • 1000 km Monza
  • 1000 km Nürburgring
  • 1000 km Silverstone
  • 1000 km Spa
  • 1000 km Suzuka
  • 1000 km Zeltweg

[edit] Nature

• 2.000 Mm — Distance from Beijing to Hong Kong as the crow flies
• 2.800 Mm — Narrowest width of Atlantic Ocean (Brazil-West Africa)
• 2.850 Mm — Length of the Danube river
• 2.205 Mm — Length of Sweden's total land boundaries
• 2.515 Mm — Length of Norway's total land boundaries
• 3.690 Mm — Length of the Volga river, longest in Europe
• 4.350 Mm — Length of the Huang He
• 4.715 Mm — Length of the Nile
• 4.800 Mm — Widest width of Atlantic Ocean (U.S.-Northern Africa)
• 5.100 Mm — Distance from Dublin to New York as the crow flies
• 6.270 Mm — Length of the Mississippi-Missouri River system
• 6.380 Mm — Length of the Yangtze River
• 6.762 Mm — Length of the Amazon system, longest on Earth
• 8.200 Mm — Distance from Dublin to San Francisco as the crow flies

[edit] Astronomical

• 1.000 Mm — Estimated shortest axis of triaxial dwarf planet Haumea
• 1.186 Mm — Diameter of Charon, the largest moon of Pluto
• 1.280 Mm — Diameter of the trans-Neptunian object 50000 Quaoar
• 1.436 Mm — Diameter of Iapetus, one of Saturn's major moons
• 1.578 Mm — Diameter of Titania, the largest of Uranus' moons
• 1.960 Mm — Estimated longest axis of 2003 EL₆₁
• 2.320 Mm — Diameter of Pluto
• 2.400 Mm — Diameter of the dwarf planet Eris, the largest trans-Neptunian object found to date
• 2.707 Mm — Diameter of Triton, largest moon of Neptune
• 3.122 Mm — Diameter of Europa, the smallest Galilean satellite of Jupiter
• 3.475 Mm — Diameter of Earth's Moon
• 3.643 Mm — Diameter of Io, a moon of Jupiter
• 4.821 Mm — Diameter of Callisto, a moon of Jupiter
• 4.879 Mm — Diameter of Mercury
• 5.150 Mm — Diameter of Titan, the largest moon of Saturn
• 5.262 Mm — Diameter of Jupiter's moon Ganymede, the largest moon in the solar system
• 6.366 Mm — Radius of Earth
• 6.792 Mm — Diameter of Mars

Distances longer than 10⁷ m

[edit] See also

Click on the thumbnail image to jump to the desired order of length magnitude: top-left is 1e6m, lower-right is 1e17m. (Image description)

[edit] References