This is fun - it's a science-based elimination game! Mercury/Venus: I like the answers people have given above, but these are the hard ones to keep funding. Hmm. But in another 2-3 funding cycles, the Decadal Surveys might think about them again. Earth: well, guaranteed. Mars: ditto. Jupiter: Juno to launch very soon. Europa if you're into the long-term payoffs (and depending where this decade's Europa/Titan fight goes; by the next 3 funding cycles, guaranteed to get them both). Saturn: Titan, Titan, Titan. And Enceladus. Frankly, you're going to have to drag people away from this one if you want them to stop looking at it. Uranus: If the Cassini crowd get another orbiter to go to Titan, we can send Cassini to Uranus for the better part of a decade. Neptune: Triton! We don't have to go to the Kuiper Belt to look at a KBO, and we can go into orbit instead of zooming by!
So all 8? Pushing it...but the ones that go to the outer Solar System in particular tend to be long-term missions. Anyway, the science will be more important than the simultaneity :)
no subject
Mercury/Venus: I like the answers people have given above, but these are the hard ones to keep funding. Hmm. But in another 2-3 funding cycles, the Decadal Surveys might think about them again.
Earth: well, guaranteed.
Mars: ditto.
Jupiter: Juno to launch very soon. Europa if you're into the long-term payoffs (and depending where this decade's Europa/Titan fight goes; by the next 3 funding cycles, guaranteed to get them both).
Saturn: Titan, Titan, Titan. And Enceladus. Frankly, you're going to have to drag people away from this one if you want them to stop looking at it.
Uranus: If the Cassini crowd get another orbiter to go to Titan, we can send Cassini to Uranus for the better part of a decade.
Neptune: Triton! We don't have to go to the Kuiper Belt to look at a KBO, and we can go into orbit instead of zooming by!
So all 8? Pushing it...but the ones that go to the outer Solar System in particular tend to be long-term missions.
Anyway, the science will be more important than the simultaneity :)