The answer to “Comets move around the sun in very elliptical orbits. At its closet approach, in 1986, Comet Halley was 8.79 * 107 km from the sun and moving with a speed of 54.6 km/s. What was the comets speed when it crossed Neptunes orbit in 2006?” is broken down into a number of easy to follow steps, and 45 words. Since the solution to 13.89 from 13 chapter was answered, more than 225 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Physics for Scientists and Engineers: A Strategic Approach, Standard Edition (Chs 1-36), edition: 4. The full step-by-step solution to problem: 13.89 from chapter: 13 was answered by Patricia, our top Physics solution expert on 12/28/17, 08:06PM. This full solution covers the following key subjects: . This expansive textbook survival guide covers 42 chapters, and 4463 solutions. Physics for Scientists and Engineers: A Strategic Approach, Standard Edition (Chs 1-36) was written by Patricia and is associated to the ISBN: 9780134081496.