To help compare different orders of magnitude, this page lists lengths starting at 10⁸ m (100 Mm or 100,000 km). An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. ... In general English usage, length (symbols: l, L) is but one particular instance of distance – an objects length is how long the object is – but in the physical sciences and engineering, the word length is in some contexts used synonymously with distance. Height is vertical distance; width (or breadth... The metre (Commonwealth English) or meter (American English) (symbol: m) is the SI base unit of length. ... A megametre (American spelling: megameter, symbol: Mm) is a unit of length equal to 106 metres (from the Greek words megas = big and metro = count/measure). ... A kilometre (American spelling: kilometer), symbol: km is a unit of length in the metric system equal to 1000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ...

Distances shorter than 10⁸ m To help compare different orders of magnitude, this page lists lengths starting at 107 m (10,000 km). ...

• 111,191 km — 20,000 (nautical, British) leagues (see Jules Verne)
• 120,000 km — Diameter of Saturn
• 140,000 km — Diameter of Jupiter
• 299,792 km — Distance light, in a vacuum, travels in one second (see: speed of light)
• 384,000 km — average Earth-Moon distance: one lunar distance.

Distances longer than 10⁹ m League is a unit of distance long common in Europe and Latin America, although no longer an official unit in any nation. ... Jules Verne. ... Atmospheric characteristics Atmospheric pressure 140 kPa Hydrogen >93% Helium >5% Methane 0. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific context, electromagnetic radiation of any wavelength. ... For other uses, see vacuum cleaner and Vacuum (musical group). ... Look up Second in Wiktionary, the free dictionary The second (symbol: s) is the SI base unit of time. ... Cherenkov effect in a swimming pool nuclear reactor. ... Earth, also known as Terra, and Tellus mostly in the 19th century, is the third-closest planet to the Sun. ... Crust composition Oxygen 43% Silicon 21% Aluminium 10% Calcium 9% Iron 9% Magnesium 5% Titanium 2% Nickel 0. ... In celestial navigation, lunar distance is in the angle of the Moons centre from the Sun or from the bright stars. ... To help compare different distances this page lists lengths starting at 109 m (1 million km). ...

See also

• Orders of magnitude (length)