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5. SOLAR SYSTEM CLASS .... HUMAN EXPLORATION of SOLAR SYSTEM - MOON - LAUNCH PROBES FROM SHUTTLE GALILEO (JUPITER) ULYSSES (SUN) SCALE of SOLAR SYSTEM #5 in middle of graph (+ HOW YOU TRAVEL ...) Δ ~ 75 X 10^6 KM [[image]] 225 X 10^6 150 X 10^6 KM ON THIS SCALE, CAN'T EVEN SEE MOON'S ORBIT 1/4 M miles (~days) NO ~ 100 M ~ 300X longer "ITS A LONG WAYS TO MARS" ORBITAL MECHANICS (CORRECT RELATIVE POSITION ~ EVERY 2 YRS) -> ~1 yr there ~1 yr back PROBLEMS: 1) DESIGN S/C & LIFE SUPPORT TO LAST THAT LONG 2) LAUNCHING & ASSEMBLING IN LEO (#'S?) (> 2M #'S to LEO) (~40 shuttle flight)