Re: [meteorite-list] grains of sand

2013-11-08 Thread Martin Altmann
-Ursprüngliche Nachricht- Von: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] Im Auftrag von Paul Gessler Gesendet: Donnerstag, 7. November 2013 04:42 An: meteorite-list Betreff: [meteorite-list] grains of sand Was wondering about the statement

[meteorite-list] grains of sand

2013-11-07 Thread Paul Gessler
Was wondering about the statement that shooting stars we see are no bigger than grains of sand??? I here it used all the time and haven't really given it any thought. I don't buy it! I don't think a grain of sand would be able to generate enough light to be visible from earth? Has anyone

Re: [meteorite-list] grains of sand

2013-11-07 Thread Robert Verish
Hi Paul, If what you're saying is true, then there are many many more meteors that we are not seeing (but would be visible to instruments more sensitive than are eyes, or to astronauts in Earth orbit that are closer to the action).  I think that a grain of sand is large enough to ionize

Re: [meteorite-list] grains of sand

2013-11-07 Thread Robin Whittle
Hi Bob, You wrote, in part: I also feel that the too-often-used phrase nothing made it to the ground - it all burned-up is too ill-informed. How is it physically possible for a cobble-pebble-sandgrain to continue traveling fast enough to completely ablate down to total nothingness? It's my