which is the only planet that has not been visted by a apacecraft?

Question

pluto
neptune
venus

Answer 1

Pluto is the only planet that has not yet been visited by a spacecraft. However, in January 2006 the New Horizons spacecraft was launched from Cape Canaveral, Florida, and scientists anticipate that it will reach Pluto by 2015.

Answer 2

Wow, that's a tougher question than a person might think.

Based on the currently accepted nine planets, cntrytrvlr is exactly right, both about Pluto being the only one of the nine not visited and the New Horizons spacecraft that was launched this year.

However, there have been three other objects discovered that are at least being considered for 'planetary status'. Two objects smaller than Pluto and further away probably won't be awarded planetary status. The third, USB 2003 UB, is more of a problem. It's bigger than Pluto, but has a highly eccentric orbit at an angle of about 45 degrees relative to the plane of most of the other planets. Accepting it as a planet raises the possibility that we'll eventually have to accept hundreds of objects orbiting the Sun as planets. Rejecting it as a planet raises the possibility of demoting Pluto from planetary status, since Pluto's orbit falls roughly in the same category as USB 2003 UB, plus Pluto is smaller. The International Astronomical Union is supposed to decide on the 'official' definition of a planet and decide whether the three new objects qualify as planets sometime this summer.

So, by the end of the year, the answer could range from "all of the planets have been visited by spacecraft" to "all but four (including three yet to be named) planets have been visited by spacecraft".

If I had to bet, the definition will reject new objects similar to Pluto, but Pluto will be kept as a planet anyway just because of tradition.

Answer 3

The guy "Chick_Norris", above, is incorrect. Mariner 10 did a close fly-by of Mercury in 1974 through 1975.

There is a probe on the way to Pluto. The New Horizons should reach Pluto around 2016.

Until that happens, we have sent a probe to every planet except Pluto.

Answer 4

Pluto

Answer 5

mercury, jupiter, saturn, neptune, uranus, pluto. dont even argue.

you know why? because you CANT land on a gas giant. mercury is too hot. and pluto is a waste of time and money because astronomers doubt that its a planet in the first place. now if you mean, a satelite or research probe passed by it, then yeah. most of them. even pluto. but not mercury. One reason is, after getting that close to the sun, and trying to hit a tiny planet, any wrong move would cause a probe or lander to be pulled by the sun.

Answer 6

Pluto

Answer 7

pluto has never benn visited by an unmanned spacecraft.however, the moon is the only heavinly body that has been visited by a manned spacecraft.no other planet has yet had man walk it's surface.

Answer 8

I think it is pluto and neptune. I know voyager 2 passed by neptune a few years ago. I want to be an astronomer. if you have any questions click my avatar.

Answer 9

May be Pluto

Answer 10

Pluto but ones on its way.