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12 May 15
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19 Jan 13
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The Oort cloud /ˈɔrt/,[1] or the Öpik–Oort cloud[2] (named after Jan Oort), is a hypothesized spherical cloud of predominantly icy objects that may extend up to roughly 50,000 AU, or nearly a light-year, from the Sun.[3] This places the cloud at nearly a quarter of the distance to Proxima Centauri, the nearest star to the Sun. The Kuiper belt and the scattered disc, the other two reservoirs of trans-Neptunian objects, are less than one thousandth of the Oort cloud's distance.
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The outer limit of the Oort cloud defines the cosmographical boundary of the Solar System and the region of the Sun's gravitational dominance.
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Proxima Centauri, the nearest star to the Sun.
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29 May 12
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21 Mar 12
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The Oort cloud /ˈɔərt/,[1] or the Öpik–Oort cloud[2] (Finnish: [ˈøpik.ˈoːrt]), is a hypothesized spherical cloud of comets which may lie roughly 50,000 AU, or nearly a light-year, from the Sun.[3] This places the cloud at nearly a quarter of the distance to Proxima Centauri, the nearest star to the Sun. The Kuiper belt and the scattered disc, the other two reservoirs of trans-Neptunian objects, are less than one thousandth of the Oort cloud's distance. The outer limit of the Oort cloud defines the cosmographical boundary of the Solar System and the region of the Sun's gravitational dominance.
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17 Nov 11
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19 Aug 11
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hypothesized
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The outer limit of the Oort cloud defines the cosmographical boundary of the Solar System and the region of the Sun's gravitational dominance
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two separate regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud
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The region can be subdivided into a spherical outer Oort cloud of 20,000–50,000 AU (0.32–0.79 ly), and a doughnut-shaped inner Oort cloud of 2,000–20,000 AU (0.03–0.32 ly)
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09 May 11
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23 Apr 11
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16 Feb 11
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17 Dec 10
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09 Dec 10
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may lie roughly 50,000 AU
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15 Aug 10
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05 Aug 10
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12 Jan 10
Sam HWikipidia, good info on the Oort cloud. Has general information on the Oort cloud.
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22 Sep 09
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13 Mar 07
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06 Oct 06
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26 Apr 06
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