in Journey Into Unknown Worlds (Bell Features, 1951 series) #37 ([circa early 1951])
in Suspense (Marvel, 1949 series) #7 (March 1951) [with different illustration]story has spot illustration on second page
Plot similarities with Rocket Ship Galileo by Robert A. Heinlein (1947). Plot information from Tom Lammers via the Timely-Atlas Group (timely-atlas@yahoogroups.com) April 2010.