Galileo

on //its first orbit around jupiter, the galileo spacecraft reached a maximum distance from jupiter of about 20 million kilometers.This is nearley half the distyance between the orbits of earth and venus earth closest palnetary neighbor. when the galileo probe entered jupiters atmosphere it was traviling at a speed of 106,000 mph the fastest impact speed ever achived by a man made object. at that speed one could drive around the earth at the eaquator in 14 min (assuming that there were bridges across all the oceans) or to the moon and back in only 5 hrs. on its journey from earth to jupiter galileo 2.4 billon miles along the way about 67 gallons of fuel from propultion system were used to control galileos flight path and to keep its antena pointed at earth. thats equivelant to getting 36 million miles per gallon! with that kind of milage ine would use only 4 tablespoon of gasoline to drive to the mon and back ! The last time galileo navigators had a chance to control the entry conditions of the atmospheric probe was approximatly 167 days prior to its arrival at jupitor. to ensure a succsesful probe orbiter radio link probe entry was requiered to occur within 8 minof the desiered time. after 167 days that allowed the navigators less that a 0.0033% error ( thats is an error of 33 parts per million) in the time only a 0.0001% error! the last orbiter trajectory correction manever was performed 100 day prior to the arrival and delivery occured 14 secconds later that the target time an equally imprssive 0.0002% error. after traviling 2.4 billion miles in just over 6 yrs to reach jupiter galileo missed its target at the jovian moon IO by only 67 miles that like shooting an arrow from los angelas at a bulls eye in new york and missing by only 6 in. since being launched from earth on october 18 1989 galileo has traveled 2.4 billion miles in just over 6 yrs to reach jupiter. thats an average speed of 44,000mph. at that speed one could drive around the earth at the equator in just 30 min or to the moon and back in just 11 hrs. ju[piters moon IO has some of the most dramatic appering volcanos arround. Gysers on IO spew out at speeds as high as 2300 mph. on aerth mt etna ejecta a mere 112 mph. terrestrial volcanos rarley reach speeds at as much as 162 miles high.//