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.

2024-09-23T22:51:23Z

Distances to objects in solar system

2024-09-23T22:50:49Z

Split Oort cloud in two.

2024-09-23T22:32:14Z

Distances to objects in solar system

2024-09-23T22:30:59Z

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

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

2024-09-22T22:15:39Z

Distances to objects in solar system

@@ Line 20: / Line 20: @@
 | '''Earth''' || '''1.00 AU''' (by definition)
 |-
-| '''Mars''' || 1.5 AU
+| '''Mars''' || 1.52 AU
 |-
 | Vesta || 2.36 AU

← Older revision		Revision as of 23:42, 26 October 2024
Line 1:		Line 1:
−	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).

@@ Line 18: / Line 18: @@
 | '''Venus''' || 0.7 AU
 |-
-| '''Earth''' || 1.00 AU (by definition)
+| '''Earth''' || '''1.00 AU''' (by definition)
 |-
 | '''Mars''' || 1.5 AU

@@ Line 8: / Line 8: @@
 {| class="wikitable" style="margin:left"
-|+ Distances in the solar system
+|+ Distances to objects near the Sun
 |-
 ! Body !! Average Distance to Sun
@@ Line 52: / Line 52: @@
 | 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.
 |-
 | Proxima Centauri || ~268,770 AU or 4.246 light years (the nearest star).

@@ Line 52: / Line 52: @@
 | 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).

@@ Line 39: / Line 39: @@
 |-
 | Pluto || 39.5 AU
 |-
 | Haumea || 43.2 AU
@@ Line 49: / Line 47: @@
 |-
 | Sedna || 489 AU
 |-
 | Scattered disk || ~100 to ~1,000 AU
 |-
 | Oort Cloud || ~2,000 to ~5,000 AU
 |}
 ==References==
 <references />

@@ Line 12: / Line 12: @@
 ! Body !! Average Distance to Sun
 |-
-| '''Sun''' || 0 AU
+| '''SUN''' || 0 AU
 |-
 | '''Mercury''' || 0.4 AU

@@ Line 12: / Line 12: @@
 ! Body !! Average Distance to Sun
 |-
-| Sun || 0 AU
+| '''Sun''' || 0 AU
 |-
-| Mercury || 0.4 AU
+| '''Mercury''' || 0.4 AU
 |-
-| Venus || 0.7 AU
+| '''Venus''' || 0.7 AU
 |-
-| Earth || 1.00 AU (by definition)
+| '''Earth''' || 1.00 AU (by definition)
 |-
-| Mars || 1.5 AU
+| '''Mars''' || 1.5 AU
 |-
 | Vesta || 2.36 AU
@@ Line 30: / Line 30: @@
 | Asteroid Belt || ~2 to ~4 AU
 |-
-| Jupiter || 5.2 AU
+| '''Jupiter''' || 5.2 AU
 |-
-| Saturn || 9.6 AU
+| '''Saturn''' || 9.6 AU
 |-
-| Uranus || 19.2 AU
+| '''Uranus''' || 19.2 AU
 |-
-| Neptune || 30.0 AU
+| '''Neptune''' || 30.0 AU
 |-
 | Pluto || 39.5 AU