Comets /
by Franklyn M. Branley ; illustrated by Giulio Maestro.
- New York : Crowell, c1984.
- 32 p. : col. ill. ; 19 x 24 cm.
- Let's-read-and-find-out science book .
"Ages 5-8, Grs K-3"--Jacket.
Explains what comets are, how they are formed, and how their unusual orbits bring them into earth's view at predictable intervals, with a special focus on Halley's comet.