http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/ Sat, 20 Apr 2013 10:44:00 +0000 hourly 1 http://wordpress.org/?v=3.4.2 http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51720 Brando Sun, 26 Apr 2009 20:40:38 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51720 Am I the only one who thought that top picture was a chalk board at a university? Am I the only one who thought that top picture was a chalk board at a university?

]]> http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51719 Ellipsis Sat, 25 Apr 2009 21:38:52 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51719 Actually, sorry, it seems we're both right -- low altitude contrails are primarily caused by vapor pressure changes, whereas high-altitude contrails are indeed caused by nucleation from combustion particulates. Actually, sorry, it seems we’re both right — low altitude contrails are primarily caused by vapor pressure changes, whereas high-altitude contrails are indeed caused by nucleation from combustion particulates.

]]> http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51718 Ellipsis Sat, 25 Apr 2009 02:50:16 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51718 No -- contrails are caused by the rapid changes in pressure as moist air travels by the wing, causing a change in vapor pressure (as vapor pressure is a function of pressure), which causes droplets to rapidly nucleate and form as the air passes by the wing. No — contrails are caused by the rapid changes in pressure as moist air travels by the wing, causing a change in vapor pressure (as vapor pressure is a function of pressure), which causes droplets to rapidly nucleate and form as the air passes by the wing.

]]> http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51717 Remote Views | Cosmic Variance | Discover Magazine Fri, 24 Apr 2009 17:47:12 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51717 [...] Blogs / Cosmic Variance « Ships that Pass in the Day [...] [...] Blogs / Cosmic Variance « Ships that Pass in the Day [...]

]]> http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51716 sirhcton Fri, 24 Apr 2009 17:18:11 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/04/24/ships-that-pass-in-the-day/#comment-51716 For God's sake, do not let the "chemtrails" (http://en.wikipedia.org/wiki/Chemtrails) get hold of this! For God’s sake, do not let the “chemtrails” (http://en.wikipedia.org/wiki/Chemtrails) get hold of this!

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