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To help compare different distances this page lists lengths starting at 109 metres (1 gigametre (Gm) or 1 billion kilometres). Distances shorter than 109 metres * 1.4 Gm — Diameter of Sun〔(Sun Fact Sheet )〕 * 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.〔Neuroscience: The Science of the Brain () p.44〕 * 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 Distances longer than 1010 metres ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1 gigametre」の詳細全文を読む スポンサード リンク
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