The Encyclopedia Americana, Volume 7Grolier, 1985 - Encyclopedias and dictionaries |
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Page 365
... comet , " in fact , derives from the flowing appearance of the tail of a bright comet ; it comes from a Greek word mean- ing " long - haired . " Comets were formerly of interest to astron- omers principally because of problems connected ...
... comet , " in fact , derives from the flowing appearance of the tail of a bright comet ; it comes from a Greek word mean- ing " long - haired . " Comets were formerly of interest to astron- omers principally because of problems connected ...
Page 367
... COMETS Although some new comets are discovered by professional astronomers , a considerable number are still found by skilled amateurs who search for them visually with small telescopes . The comets discovered by professionals are ...
... COMETS Although some new comets are discovered by professional astronomers , a considerable number are still found by skilled amateurs who search for them visually with small telescopes . The comets discovered by professionals are ...
Page 368
... Comets . While they are in the vicinity of the sun , comets suffer a continual loss of material as gases stream from the nucleus into the coma and tail . The known densities of interplanetary material are much too low for this loss ...
... Comets . While they are in the vicinity of the sun , comets suffer a continual loss of material as gases stream from the nucleus into the coma and tail . The known densities of interplanetary material are much too low for this loss ...
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