There isn't a forum for bad astronomy in print, but this seems to fit better here than in General Astronomy.
While looking up something else, I came across this definition in the 10-pound dictionary my wife has had since 1973:
Comet: a heavenly body having a starlike nucleus with a luminous mass around it, and usually a long, luminous tail; comets follow an elliptical or parabolic orbit around the sun.
Any way educated people could have thought the nucleus of a comet was starlike in 1973? And more of a quibble, but can a parabolic path be called an orbit?
Curious, I looked up "Star, sun, planet, and moon"; while the definitions were not very scientific, they were not specifically wrong. But this was a whopper:
Galaxy: 1. The Milky Way, a group of millions of stars apparently merging into a luminous band that extends across the sky. 2. Any similar but smaller group of stars.
Surely in 1973 it was widely known that there are many other spiral galaxies, and I should think, ellipticals. Is it reasonable to expect dictionary compilers to consult scientists?