Articles for April 1965 include:4) SAN MARCO SATELLITE.
7) MORE EXPLORERS, S,55C (Explorer 23).
10) AIR DENSITY INJUN EXPLORER B (Explorers 24,25).
13) RADIATION DETECTION SATELLITE (Explorer 26).
17) TV IN SPACE, The fast-developing art of space television brings promise of a clearer picture of the universe.
21) Progress Report: MARINER IV FLIES ON.
23) ALBUM: Who REALLY Designed Today’s Spaceships?
31) SATELLITE REPORT.
34) JANUS – A Manned Orbital Spacecraft with Staged Re-entry by I N. Spielberg and C.B. Cohen.
DEPARTMENTS41) IN THE NEWS
47) BOOK REVIEWS
49) LAUNCH PAD