NASA technically didn't visit any planets yet, but it has visited the moon (and was the first to send people to the moon), and it has also done many missions into lower earth orbit.
a dwarf planetAcording to NASA Pluto is a dwarf planet.
the Mariner 4 launched in 1964 by NASA
In 1986, NASA's Voyager 2 was the first and only probe to visit Uranus.
No
Visit to a Small Planet was created on 1960-02-04.
they want to visit mars
Sorry to say but NASA is not a planet! NASA is an organization that studies the planets!
Earth
No, NASA (and now the whole world) does not classify Pluto as a planet. It is classified as a dwarf planet.
Mars, the planet, was first travelled to in 1965 by Mariner 4 (a spacecraft) by the country USA from NASA.
NASA has already discovered a new planet made out of water.
Mariner 10 was the first space probe to visit Mercury. On August 3, 2004, NASA launched the MESSENGER mission to Mercury. It will flyby Earth, Venus, and Mercury itself several times before settliing into orbit around our innermost planet in March 2011.
to risky and expensive
a dwarf planetAcording to NASA Pluto is a dwarf planet.
the first encounter with another planet. it was a spacecraft sent by NASA to venus. it measured venus' temperature and is now thought to be orbiting the sun.
the Mariner 4 launched in 1964 by NASA
In 1986, NASA's Voyager 2 was the first and only probe to visit Uranus.