Astronomy - spacecraft flybys?

Question

Which object (s) have not yet been visited by spacecraft flybys?

Pluto

Any member of the asteroid belt

Uranus and Neptune

All of the above have been visited by spacecraft

Answer 1

Pluto. But not so long ago we acutually launched a plobe to go to pluto and I think by 2012 or something it should arive. The that we sent to pluto when it still was a planet was the fastest porbe we ever launched. I took the astronauts 2 days to get to the moon. It took the probe only a few hours.

Answer 2

Pluto - New Horizons should reach in in 2014 or so.

Several asteroids have been visited:  951 Gaspra and 243 Ida (and it's moon, Dactyl) were imaged by the Galileo probe, while on its way to Jupiter.   NEAR visited 253 Mathilde before orbiting 433 Eros.  The Dawn Mission, will orbit 1 Ceres and 4 Vesta in 2011-2015. (Among others)

Uranus and Neptune were visited by Voyager 2 in the late 1980's.

Answer 3

Pluto, some members of the asteroid belt and most all the members of the Ort Cloud, haven't beem visited as yet, even by flybys.  However, Pluto is supposed to be visited very soon.  Cause a probe is being sent there, even as we speak.  This probe is supposedly very fast, cause Jupiter was supposed to have been (and was, cause pictures were taken of Jupiter and it's moons) reached within 13 months of its release.  At the time of the visit to Pluto, some members of the Ort Cloud will probably also be visited.

Answer 4

Pluto is the only one on your list not yet visited by a spacecraft.