- Does "Planet X" exist, and could it come close to Earth?
Many people are fascinated by the idea of finding another planet in our Solar System, but as yet there is no good evidence that there is another large body beyond Pluto. There are several "Planet X" stories that circulate from time to time in the popular press.
http://curious.astro.cornell.edu/question.php?number=95
(Added: Sat Oct 26 2002)
- Is there a Planet X or 10th planet?
There is no known Planet X or 10th planet in our solar system. Scientists have been looking for about a hundred years. It was believed that such a planet was required to explain the orbital characteristics of the outer planets Uranus and Neptune.
http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question4.html
(Added: Tue Oct 29 2002)
- The Planet X Saga: Introduction
There are a large number of web pages, chat rooms and books about Planet X and its horrible affects on the Earth. So the question is, does this planet exist, and will it come by in May 2003 and cause all this horror? No, and no.
http://www.badastronomy.com/bad/misc/planetx/
(Added: Sat Oct 26 2002)
- What about a planet (Planet X) outside Pluto's orbit?
Pluto was discovered from discrepancies in the orbits of Uranus and Neptune. The search was for a large body to explain the discrepancies, but Pluto was discovered instead (by accident, if you will, though Clyde Tombaugh's search was systematic and thorough). Pluto's mass is too small to cause the apparent discrepancies, so the
obvious hypothesis was that there is another planet waiting to be
discovered.
http://www.faqs.org/faqs/astronomy/faq/part5/section-15.html
(Added: Sat Oct 26 2002)
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