The Voyager I and the Voyager II are the only space probes to visit Neptune. They landed in the 1980s.
Neptune does not currently have any space probes near it, but Voyager 2 is the only spacecraft to have made a flyby (in 1989).
The only space probe to have visited Neptune is Voyager 2.
To Neptune - None, although one ( Voyager 2 did a flyby of Neptune in August 1989,) has flown PAST Neptune.
10 probes have been sent to Neptune.
Only one.
Venus has no natural satellites but probes have been sent their for many years now.
as of 2010 Neptune has 13 know moons or (natural satellites) but i am not sure about 2011.
Venus has no natural satellites. It does have two artificial satellites (space probes). Venus is one of the two planets in our solar system (together with Mercury) that have no moon/natural satellite.
Saturn has a great many satellites. I'm not quite sure where "robots" come into the question. If you mean "have humans sent robotic space probes to Saturn", then the answer is yes.
There is much space debris. Humans have many decayed satellites and probes floating around.
Venus has no natural satellites but probes have been sent their for many years now.
Neptune has 13 discovered satellites.
13
NONE! only one has orbited. Voyager 2 on Aug 24, 1989
as of 2010 Neptune has 13 know moons or (natural satellites) but i am not sure about 2011.
Many different vehicles have been sent into space. Manned capsules, as well as shuttles and even satellites and probes have left the world into space.
Apart from visiting probes sent from Earth, Venus has no natural satellites of its own.
Venus has no natural satellites. It does have two artificial satellites (space probes). Venus is one of the two planets in our solar system (together with Mercury) that have no moon/natural satellite.
there has been 16 probes that had been sent to venus.
Saturn has a great many satellites. I'm not quite sure where "robots" come into the question. If you mean "have humans sent robotic space probes to Saturn", then the answer is yes.
There is much space debris. Humans have many decayed satellites and probes floating around.
No natural satellites of Venus have been discovered.