\<COLOUR 1> SIZE: \<COLOUR 0> Cylinder, 53 cm long, 58 cm diameter
\<COLOUR 1> WEIGHT: \<COLOUR 0> 60 kg
\<COLOUR 1> COUNTRY: \<COLOUR 0> Great Britain
\<COLOUR 1> COMMENTS: \<COLOUR 0> First British satellite and first international cooperative launch, GB/USA; studies ionosphere and cosmic rays; other four Aerial satellites carry out studies in radio astronomy and X-rays.