▁press ur ization ▁system . ▁During ▁inter plan et ary ▁cru ise , ▁the ▁v apor ▁mix ▁had ▁accum ulated ▁in ▁feed ▁lines ▁and ▁press ur ant ▁lines , ▁resulting ▁in ▁explos ion ▁and ▁their ▁ru pt ure ▁after ▁the ▁engine ▁was ▁restart ed ▁for ▁routine ▁course ▁correction . ▁A ▁similar ▁problem ▁later ▁cri pp led ▁the ▁Ak ats uki ▁space ▁pro be ▁in ▁ 2 0 1 0 . ▁Although ▁none ▁of ▁the ▁primary ▁object ives ▁were ▁achieved , ▁the ▁mission ▁provided ▁inter plan et ary ▁cru ise ▁phase ▁data , ▁collected ▁up ▁to ▁the ▁date ▁of ▁last ▁contact . ▁This ▁data ▁would ▁be ▁useful ▁for ▁subsequent ▁miss ions ▁to ▁Mars . ▁Science ▁instruments ▁originally ▁developed ▁for ▁Mars ▁Ob server ▁were ▁placed ▁on ▁four ▁subsequent ▁space craft ▁to ▁complete ▁the ▁mission ▁object ives : ▁Mars ▁Global ▁Survey or ▁launched ▁in ▁ 1 9 9 6 , ▁Mars ▁Cl imate ▁Or b iter ▁launched ▁in ▁ 1 9 9 8 , ▁ 2 0 0 1 ▁Mars ▁Od ys sey ▁launched ▁in ▁ 2 0 0 1 ▁and ▁Mars ▁Re con na issance ▁Or b iter ▁launched ▁in ▁ 2 0 0 5 . ▁ ▁Int ended ▁operations ▁ ▁On ▁August ▁ 2 4 , ▁ 1 9 9 3 , ▁Mars ▁Ob server ▁would ▁turn ▁ 1 8 0 - de gre es ▁and ▁ign ite ▁the ▁b ip rop ell ant ▁thrust ers ▁to ▁slow ▁the ▁space craft , ▁entering ▁into ▁a ▁highly ▁elli pt ical ▁orbit . ▁Over ▁the ▁next