Rockets are not a subset of Satellites. Some satellites are rockets, some aren't. Some rockets are satellites, some aren't. They are intersecting sets. -----Original Message----- From: Bram Dorreman [mailto:bram.dorreman@gmail.com] Sent: Wednesday, March 11, 2009 19:28 To: kfetter@yahoo.com Cc: Seesat List Subject: Re: peice of chinese rocket spotted 2009/3/12 Kevin Fetter wrote: > > So satellite seen was CZ-4 DEB ( 026285 ). I call everything man made in orbit a satellite, even if other's call it a rocket. > > Kevin Every rocket (when in earth or other planet's orbit is a satellite), many satellites are not rockets. Rockets are a subset of the set of (artificial) satellites. People using "rocket" are more specific about the original function of this now satellite. Often rockets are the brighter satellites. Bram Dorreman ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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