Spacelab, Space Station, Hubble Telescope, and other man-made orbiting objects. Add the Moon if it meets the definition of an object. Answer may also depend on the definition of "visited".
astatine can be found in no everyday objects. it is only found in Uranium :)
moon baby :D
Magnetic field
Yes, humans can only survive in 135 degrees
Humans.
No humans have ever been to Uranus. Voyager 2 is the only space probe that has visited it.
earth is the first planet humans have visited and the only one
no, they haven't the only place in the solar system which actual humans have visited is the earth's moon. The other planets and moons have been visited by probes.
The Moon.
None. Humans have only landed on our moon.
The only place other than the Earth that humans have physically visited was the Moon. Exactly twelve (12) American men walked on it, two at a time, between 1969 and 1972, and nobody else has been there since then ... over 40 years.
Voyager 2 is the only spacecraft to visited Neptune.
The Moon is the only place exception Earth where humans have gone.
Other than visiting individual space stations, the moon is the only place that astronauts have visited.
Not yet. The New Horizons space probe, launched in 2006, will fly by Pluto in June 2015. Humans themselves have only been as far as the moon.
The only planet humans have ever been on is Earth.
Everything that you can think of about space (that is factual) is what humans know about space. Humans are the only reason we know space contains planets, stars, and moons.