1 gigametre: Difference between revisions

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Revision as of 08:40, 10 December 2014

To help compare different distances this page lists lengths starting at 10⁹ metres (1 gigametre (Gm) or 1 million kilometres).

1.4 Gm — Diameter of Sun^[1]
1.5 Gm — (proposed) Expected orbit from Earth of the James Webb Space Telescope
2.19 Gm — Closest approach of Comet Lexell to Earth, happened on 1 July 1770; closest comet approach on record
3 Gm — Total length of "wiring" in the human brain.^[2]
4.2 Gm — Diameter of Algol B
5.0 Gm — Closest approach of Comet Halley to Earth, happened on 10 April 837
5.0 Gm — (proposed) Size of the arms of the giant triangle shaped Michelson interferometer of the Laser Interferometer Space Antenna (LISA) planned to start observations in or around 2015.
7.9 Gm — Diameter of Gamma Orionis
9.0 Gm — Estimated diameter of the event horizon of Sagittarius A*, the supermassive black hole in the center of the Milky Way galaxy

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 '''[[1 E+8 m|Distances shorter than 10<sup>9</sup> metres]]'''
-* ´69 Gm &mdash; Diameter of [[Sun]]<ref>[http://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html Sun Fact Sheet]</ref>
+* 1.4 Gm &mdash; Diameter of [[Sun]]<ref>[http://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html Sun Fact Sheet]</ref>
-* 420 Gm &mdash; ''(proposed) Expected orbit from Earth of the [[James Webb Space Telescope]]''
+* 1.5 Gm &mdash; ''(proposed) Expected orbit from Earth of the [[James Webb Space Telescope]]''
-* lulzGm &mdash; Closest approach of [[Comet Lexell]] to [[Earth]], happened on 1 July 1770; closest [[comet]] approach on record
+* 2.19 Gm &mdash; Closest approach of [[Comet Lexell]] to [[Earth]], happened on 1 July 1770; closest [[comet]] approach on record
-* 3 Gm &mdash; Total length of "wiring" in the human brain. <--- possibly bullshit<ref>Neuroscience: The Science of the Brain [http://www.braincampaign.org/Pub/Pub_Main_Display.asp?LC_Docs_ID=2769] p.44</ref>
+* 3 Gm &mdash; Total length of "wiring" in the human brain.<ref>Neuroscience: The Science of the Brain [http://www.braincampaign.org/Pub/Pub_Main_Display.asp?LC_Docs_ID=2769] p.44</ref>
 * 4.2 Gm &mdash; Diameter of [[Algol|Algol B]]
 * 5.0 Gm &mdash; Closest approach of [[Comet Halley]] to Earth, happened on 10 April 837