Comets(30 slides) $60

This slide set shows comet orbits(parabolic) with the forming tail pointing away from the sun. Two slides show the orbit of Swift-Tuttle (a typical periodic comet) and its intersection with Earth's orbit in the year 2126.Two slides show the Kuiper Belt and Oort cloud. Some models of comets are included with top notch images from Hyakutake, Halley, Ikeya-Seki, Bennett, IRAS, Swift-Tuttle, and others. Also features enhanced Giotto image of Halley nucleus.

Copyright 1999 by Pan Terra Inc., PO Box 556, Hill City, SD, USA 57745.

All rights reserved.......Tel or fax 605-574-4760