On-sale date from copyright registration.
Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Vs the Vantor, 1st. Also in Mystery in Space #78.
Globular clusters, North American Nebula, likelihood of stars colliding.
Letters from: Scott Dickerson, Joe Rusnak, Lon Wolff, Carl Gafford and Brian Mahoney.