The Encyclopedia Americana, Volume 7Grolier, 1985 - Encyclopedias and dictionaries |
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Page 365
... comets also show a concentration toward the average plane of motion of the major planets . Practically all these comets revolve about the sun in the same direction as do the planets . Comet Halley , which revolves in the retrograde ...
... comets also show a concentration toward the average plane of motion of the major planets . Practically all these comets revolve about the sun in the same direction as do the planets . Comet Halley , which revolves in the retrograde ...
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 traveled along together , first one ap- pearing brighter and then the other , until both had receded too far from the sun to be seen . In 1852 the two comets returned together , more widely separated , and one appreciably ...
... comets traveled along together , first one ap- pearing brighter and then the other , until both had receded too far from the sun to be seen . In 1852 the two comets returned together , more widely separated , and one appreciably ...
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