As Pluto is no longer a planet - all of them.
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.
NASA has launched the Kepler mission to search for new planets.
Most of the NASA planets fall in the world, although a few of them haven't, whereas relatively few non-NASA planets fall in the world.
No. NASA is not in the planet discovering business. That is done by others. NASA does send up stuff like the Hubble etc. but I think it is JPL that actually runs it. Oh, and there has never been anything to suggest that life has been discovered out there, by *anyone*.
Sorry to say but NASA is not a planet! NASA is an organization that studies the planets!
The NASA rover operates in space, on planets other than the Earth.
All of the planets in the Solar System have been visited by machines except for the planet Pluto. There was a machine that was launched in 2004 for a flyby to Pluto in 2014.
flyby A+
It depends on what kind of spacecraft we're talking about. There's this type of spacecraft called 'Flyby' Spacecraft. Flyby Spacecrafts are those who cannot observe distant objects. They would just flyby planets, asteroids, or whatever, and avoid being caught by a planet's magnetic field, or orbit. Please be more specific :)
It depends on the age of the student. For youngsters it is best to start about the planets, teaching them about them and letting them draw them. For older students you should go to the NASA sight and read about NASA for they are America's leading space agency.
Yes, NASA has sent a couple of unmanned probes to examine Mercury, Mariner 10 which did a flyby and the MESSENGER orbiter.
1991. Chuck Norris and Arnold Schwarzenegger Had an armwrestling fight.