\<COLOUR 1> SIZE: \<COLOUR 0> Cylinder, 2.3 metres long, 38 cm in diameter
\<COLOUR 1> WEIGHT: \<COLOUR 0> 37 kg
\<COLOUR 1> COUNTRY: \<COLOUR 0> USA
\<COLOUR 1> COMMENTS: \<COLOUR 0> The first of a series of Astronomy Explorer satellites; the first satellite to study gamma rays; its findings cast fresh doubts on the steady state theory of the universe.