8 , ▁ 1 9 9 4 ▁| 1 4 ▁days , ▁ 1 7 ▁hours , ▁ 5 5 ▁minutes , ▁ 1 ▁second ▁| Intern ational ▁Micro gravity ▁Labor atory - 2 ▁| - ▁| 5 ▁| End e av our ▁| ST S - 6 7 ▁| M arch ▁ 2 , ▁ 1 9 9 5 ▁| 1 6 ▁days , ▁ 1 5 ▁hours , ▁ 8 ▁minutes , ▁ 4 8 ▁seconds ▁| AST RO - 2 ▁| - ▁| 6 ▁| Col umb ia ▁| ST S - 7 3 ▁| Oct ober ▁ 2 0 , ▁ 1 9 9 5 ▁| 1 5 ▁days , ▁ 2 1 ▁hours , ▁ 5 3 ▁minutes , ▁ 1 6 ▁seconds ▁| Un ited ▁States ▁Micro gravity ▁Labor atory - 2 ▁| - ▁| 7 ▁| Col umb ia ▁| ST S - 7 5 ▁| F ebru ary ▁ 2 2 , ▁ 1 9 9 6 ▁| 1 5 ▁days , ▁ 1 7 ▁hours , ▁ 4 0 ▁minutes , ▁ 2 2 ▁seconds ▁| T ether ed ▁Sat ellite ▁System - 1 R ▁( ref light ▁of ▁T ether ed ▁Sat ellite ▁System - 1 ▁on ▁ST S - 4 6 ) Un ited ▁States ▁Micro gravity ▁Pay load - 3 ▁| - ▁| 8 ▁| Col umb ia ▁| ST S - 7 8 ▁| J une ▁ 2 0 , ▁ 1 9 9 6 ▁| 1 6 ▁days ,