There are many planets outside our solar system, some bigger and some smaller. So far we have mostly found larger ones as it is harder to detect ones the size of Earth and smaller.
Well, your probably on planet earth unless you are an alien.
The bigger planet is Earth.
All planets other than Earth could be considered alien. Earth is the only planet known to harbor life.
Jupiter is bigger.
the alien comes from another planet(Mars) in search of a secret location on Earth
There have been no signs of an alien life form found on planet earth yet.
obviously Jupiter
Mars. Not Mars. Jupiter is a lot bigger than Earth, but the Sun is much bigger than a planet.
Yes, Uranus is much bigger. Earth's diameter is 12,756km while Uranus's diameter is 51,118km.
Jupiter is 11 times bigger than the Earth =)
UFO Files - 2004 An Alien History of Planet Earth 3-9 was released on: USA: 26 June 2006
The cast of Invasion of the Planet Earth - 2004 includes: Guntbert Warns as Alien Soldier