Astronomical Unit - Revision history

RichardWSmith: /* Distances to objects in solar system */

2024-10-30T00:21:49Z

Distances to objects in solar system

2024-10-26T23:42:03Z

An AU is about 8.3 light minutes, not 8.0.

← Older revision		Revision as of 00:42, 27 October 2024
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	An '''astronomical unit''' (AU) is the average distance between the Earth and the Sun. It is defined as exactly 149,597,871 km, and equals approximately 8 [[Light-minute\|light-minutes]]. The unit is most commonly used to measure distances within our and other solar systems.<ref>McClure, Brian. 2017. [https://earthsky.org/space/what-is-the-astronomical-unit “What Is an Astronomical Unit?”] EarthSky. October 23, 2017. </ref>		An '''astronomical unit''' (AU) is the average distance between the Earth and the Sun. It is defined as exactly 149,597,871 km, and equals approximately 8.3 [[Light-minute\|light-minutes]]. The unit is most commonly used to measure distances within our and other solar systems.<ref>McClure, Brian. 2017. [https://earthsky.org/space/what-is-the-astronomical-unit “What Is an Astronomical Unit?”] EarthSky. October 23, 2017. </ref>

	[[Mars]] is about 1.5 AU from the Sun, which means it is 1.5 times the distance from the [[Earth]] to the Sun, or approximately 224 million km from the Sun (149,597,871 km • 1.5).		[[Mars]] is about 1.5 AU from the Sun, which means it is 1.5 times the distance from the [[Earth]] to the Sun, or approximately 224 million km from the Sun (149,597,871 km • 1.5).

2024-09-23T22:51:23Z

Distances to objects in solar system

2024-09-23T22:50:49Z

Split Oort cloud in two.

← Older revision		Revision as of 23:50, 23 September 2024
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	{\| class="wikitable" style="margin:left"		{\| class="wikitable" style="margin:left"
	\|+ Distances in the ~~solar system~~		\|+ Distances to objects near the Sun
	\|-		\|-
	! Body !! Average Distance to Sun		! Body !! Average Distance to Sun
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	\| Scattered disk \|\| ~100 to ~1,000 AU		\| Scattered disk \|\| ~100 to ~1,000 AU
	\|-		\|-
	\| Oort Cloud \|\| ~~starts at~~ ~2,000 to ~5,000 AU ~~and goes~~ to ~~half way to nearby stars.~~		\| Inner Oort Cloud \|\| (~disk shaped) Inner edge ~2,000 to ~5,000 AU; outer edge ~20,000 AU.
			\|-
			\| Outer Oort Cloud \|\| (spherical) ~20,000 to ~200,000 AU ?
	\|-		\|-
	\| Proxima Centauri \|\| ~268,770 AU or 4.246 light years (the nearest star).		\| Proxima Centauri \|\| ~268,770 AU or 4.246 light years (the nearest star).

2024-09-23T22:32:14Z

Distances to objects in solar system

← Older revision		Revision as of 23:32, 23 September 2024
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	\| Scattered disk \|\| ~100 to ~1,000 AU		\| Scattered disk \|\| ~100 to ~1,000 AU
	\|-		\|-
	\| Oort Cloud \|\| ~2,000 to ~5,000 AU		\| Oort Cloud \|\| starts at ~2,000 to ~5,000 AU and goes to half way to nearby stars.
	\|-		\|-
	\| Proxima Centauri \|\| ~268,770 AU or 4.246 light years (the nearest star).		\| Proxima Centauri \|\| ~268,770 AU or 4.246 light years (the nearest star).

2024-09-23T22:30:59Z

Distances to objects in solar system: Organized and added nearest star.

← Older revision		Revision as of 23:30, 23 September 2024
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	\|-		\|-
	\| Pluto \|\| 39.5 AU		\| Pluto \|\| 39.5 AU
	\|-
	~~\| Kuiper belt \|\| ~30 to ~50 AU~~
	\|-		\|-
	\| Haumea \|\| 43.2 AU		\| Haumea \|\| 43.2 AU
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	\|-		\|-
	\| Sedna \|\| 489 AU		\| Sedna \|\| 489 AU
			\|-
			\| Kuiper belt \|\| ~30 to ~50 AU
	\|-		\|-
	\| Scattered disk \|\| ~100 to ~1,000 AU		\| Scattered disk \|\| ~100 to ~1,000 AU
	\|-		\|-
	\| Oort Cloud \|\| ~2,000 to ~5,000 AU		\| Oort Cloud \|\| ~2,000 to ~5,000 AU
			\|-
			\| Proxima Centauri \|\| ~268,770 AU or 4.246 light years (the nearest star).

	\|}		\|}

	==References==		==References==
	<references />		<references />

2024-09-22T22:28:50Z

Distances to objects in solar system

2024-09-22T22:27:26Z

Distances to objects in solar system

2024-09-22T22:19:15Z

Distances to objects in solar system: Added more bodies

← Older revision		Revision as of 23:19, 22 September 2024
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	\|+ Distances in the solar system		\|+ Distances in the solar system
	\|-		\|-
	! Body !! Distance to Sun		! Body !! Average Distance to Sun
	\|-		\|-
	\| Sun \|\| 0 AU		\| Sun \|\| 0 AU
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	\| Mars \|\| 1.5 AU		\| Mars \|\| 1.5 AU
	\|-		\|-
	\| Ceres \|\| 2.77 AU		\| Vesta \|\| 2.36 AU
			\|-
			\| Pallas \|\| 2.77 AU
			\|-
			\| Ceres \|\| 2.8 AU
	\|-		\|-
	\| Asteroid Belt \|\| ~2 to ~4 AU		\| Asteroid Belt \|\| ~2 to ~4 AU

2024-09-22T22:15:39Z

Distances to objects in solar system

← Older revision		Revision as of 23:15, 22 September 2024
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	==Distances to objects in solar system==		==Distances to objects in solar system==

	{\| class="wikitable" style="margin:~~auto~~"		{\| class="wikitable" style="margin:left"
	\|+ Distances in the solar system		\|+ Distances in the solar system
	\|-		\|-
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	\| Oort Cloud \|\| ~2,000 to ~5,000 AU		\| Oort Cloud \|\| ~2,000 to ~5,000 AU
	\|}		\|}


	==References==		==References==
	<references />		<references />