Quote:
Originally Posted by Larry Jacks
There's also that pesky problem of propellant. Cassini burned a lot of propellant to enter orbit around Saturn. I doubt it has enough propellant today to reach escape velocity. By the time they're getting ready to decommission Cassini, the propellant tanks will probably be just about empty.
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The article linked in the OP implies that there will be at least enough propellant, combined with gravitational assists from Titan to get the probe well outside Saturn's influence. Missions suggested in the article include crashing into Mercury or Jupiter, and flybys of one or more KBOs. If it has enough fuel to do any of these things, I don't see why it couldnt do a Uranus or Neptune flyby.