Talk:Heliosphere
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[edit] Pic of the day
The image Image:Voyager 1 entering heliosheath region.jpg is due up as Wikipedia:Picture of the Day on Sunday and so will also be shown on the Main Page. This picture illustrates a range of related articles, but I've decided that Heliosphere is probably the most useful primary link.
The associated caption is at Wikipedia:Picture of the day/August 21, 2005. The caption is normally based on excepts drawn from the illustrated article, but in this case I've had to take snippets from several different places. Hopefully, someone editing this page, can take a look at the caption and make sure it still makes sense. In particular it looks like the December 2004 date for Voyager 1 entering the heliosheath may not be universally accepted just yet. -- Solipsist 11:48, 19 August 2005 (UTC)
[edit] Subsonic
How exactly is 250,000 mph subsonic?
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- It is compared to the speed of sound in the material being discussed. In this case the subject is basically a very thin gas. You might have confused the terminology with that of the speed of sound in air at sea level. (SEWilco 04:59, 21 August 2005 (UTC))
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- I was wondering this same thing. Perhaps since the related photo is on the front page and will be prominent for a bit, it would make more sense to either a) change the adjective or b) expain how 250,000 mph is subsonic. It's not very obvious for non-astro-physicists. --JD79 13:41, 21 August 2005 (UTC)
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