Talk:Orders of magnitude (length)

Merged article notices

Examples moved from metre article

• Megametre
  • The Earth's polar circumference is 40.01 Mm.
  • The distance from Amsterdam to Bordeaux is approximately 1 Mm.
  • The Earth's equatorial diameter is 12.76 Mm.

• Gigametre
  • diameter of the Sun is 1.4 Gm
  • mean radius of Mercury's orbit is 57.9 Gm
  • light travels the distance of 1 Gm in approximately 3.34 s

• Terametre
  • the mean radius of Saturn's orbit is 1.43 Tm
  • the mean radius of Neptune's orbit is 4.50 Tm
  • light travels the distance of 1 terametre in 56 min

• Petametre
  • the distance from the Sun to Proxima Centauri is 40 Pm
  • the distance from the Sun to Sirius is 81 Pm
  • light travels the distance of 1 Pm in 39 days

• Exametre
  • the distance to Betelgeuse is 4 Em
  • light travels the distance of 1 Em in 105.7 years

• Zettametre
  • the diameter of our galaxy is about 1.0 Zm
  • distance to the Large Magellanic Cloud is 1.6 Zm
  • distance to the Andromeda Galaxy is 22.3 Zm

• Yottametre
  • diameter of the Local Supercluster is 2 Ym
  • distance to the farthest known quasar is 265 Ym
  • distance to the cosmic light horizon is 440 Ym

• Micrometre
  • 1.55 µm — wavelength of light used in optical fibre
  • 6 µm — anthrax spore
  • 6-8 µm — diameter of a human red blood cell
  • 7 µm — width of strand of spider web [1]
  • 1-10 µm — diameter of typical bacterium
  • about 10 µm — size of a fog, mist or cloud water droplet

• Nanometre
  • 1.1 nm — diameter of a single-walled carbon nanotube
  • 2 nm — diameter of DNA helix

• Femtometre
  • It is commonly used in measuring the diameter of atomic nuclei. The diameter of an atomic nucleus is up to about 15 fm. Neutrons and protons are about 1 fm in diameter.

"1 E-23 m" listed at Redirects for discussion

The redirect 1 E-23 m has been listed at redirects for discussion to determine whether its use and function meets the redirect guidelines. Readers of this page are welcome to comment on this redirect at Wikipedia:Redirects for discussion/Log/2024 March 20 § 1 E-23 m until a consensus is reached. Utopes _{(talk / cont)} 21:17, 20 March 2024 (UTC)

Merge proposal

The article List of examples of lengths doesn't seem any more necessary than the hypothetical article List of commanders-in-chief of the United States Armed Forces. – MrPersonHumanGuy (talk) 10:59, 30 May 2024 (UTC)

My translation of the case is that this is a merge for overlap; that seems fair enough. Support the proposal to merge, but even a redirect would be fine. Klbrain (talk) 09:16, 16 October 2024 (UTC)

  Y Merger complete. Klbrain (talk) 12:11, 16 November 2024 (UTC)

Quetta

Since Quetta (=10³⁰) is now an official SI prefix, should a section for quettametre Qm be added? There isn't much information to put in it though... 2A0A:EF40:E4F:1:47B5:F2BA:D603:1C82 (talk) 20:53, 12 December 2024 (UTC)