RT @perthobs: #ThisDayInSpace 1918 Robert Goddard demonstrated a tube-launched solid propellant rocket using a music stand for a… twitter.com/i/web/status/7…
RT @perthobs: #ThisDayInSpace 1918 Robert Goddard demonstrated a tube-launched solid propellant rocket using a music stand for a… twitter.com/i/web/status/7…