f4lisa Posted February 26, 2006 Share Posted February 26, 2006 why are comets only visible from the Earth every few years? Link to comment Share on other sites More sharing options...
insane_alien Posted February 26, 2006 Share Posted February 26, 2006 because they spend most of their orbit outside the solar system and only start flaring inside the orbit of saturn. Link to comment Share on other sites More sharing options...
swansont Posted February 26, 2006 Share Posted February 26, 2006 Not sure I understand the context of your question. They need to be near the sun to be visible and they tend to have long orbital periods. And there are a finite number of them. Link to comment Share on other sites More sharing options...
f4lisa Posted February 26, 2006 Author Share Posted February 26, 2006 thank you! Link to comment Share on other sites More sharing options...
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