 Nyora kupfuurira kweiyi ndima - Mushure mekuparara kweSpace Shuttle Challenger, uye mwedzi mishomanene bedzi Shuttle-Centaur isati yarongwa kutiza, NASA yakagumisa kuti kwakanga kune ngozi zvikuru kubhururuka neCentaur paShuttle. Zvidzidzo zvacho zvakatangwa neIUS ine simba duku zvikuru ine mafuta akasimba, Galileo achida rubatsiro rwakawanda rwegiravhiti kubva kuVenus nePasi kuti asvike kuJupiter. 