PC Pals Forum

General Discussion => Science & Nature => Topic started by: sam on April 25, 2009, 16:37

Title: Ships that Pass in the Day
Post by: sam on April 25, 2009, 16:37

Quote

We’ve all become familiar with contrails — the cloud tracks that planes leave as they fly through certain altitudes:

http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/

Title: Re: Ships that Pass in the Day
Post by: Simon on April 25, 2009, 19:44

I'll have to look at those later.  :)

Title: Re: Ships that Pass in the Day
Post by: Clive on April 26, 2009, 09:51

I've learnt something today!   :D

Title: Re: Ships that Pass in the Day
Post by: Simon on April 26, 2009, 10:01

Me too!  :)

Title: Re: Ships that Pass in the Day
Post by: mistybear on April 27, 2009, 09:22

I didn't know that either, amazing.