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An Astronomical Unit is the mean Earth-Sun distance (about 93 million miles).
For comparison, Pluto, the outermost planet, orbits the sun at an average distance of 39.5 AU.

Get on the APOD PING list!

1 posted on 06/23/2002 9:24:43 PM PDT by petuniasevan

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To: MozartLover; Joan912; NovemberCharlie; snowfox; Dawgsquat; viligantcitizen; theDentist; grlfrnd; ...

APOD PING!

2 posted on 06/23/2002 9:26:12 PM PDT by petuniasevan

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To: petuniasevan

Please add me to your ping list.

4 posted on 06/23/2002 9:42:43 PM PDT by mtngrl@vrwc

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To: petuniasevan

Fascinating, and WAY over my head! Thanks!

8 posted on 06/24/2002 2:12:41 AM PDT by MeekOneGOP

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To: petuniasevan

There was a thread a while ago about Pioneer taking some measurements of the heliopause. Effects are very small; there isn't much happening at the heliopause.

9 posted on 06/24/2002 9:13:19 AM PDT by RightWhale

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To: petuniasevan

Would you be so kind as to add me to the APOD ping list. Thanks! You do a nice job of posting the articles that accompany the pictures.

10 posted on 06/24/2002 9:31:55 AM PDT by lds23

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