The larger and heavier something is, the harder it is to get into space. The more weight you put into a spacecraft, the more fuel you need. And on top of that, you need additional fuel to get that fuel into space, so the need for fuel increases exponentially with the weight of the spacecraft.
rovers
people launch it
Rovers are a type of space probe. Space probes are any robotic mechanism sent out of Earth's atmosphere to explore and gather information.
Yes... Are you really that thick...
Rovers and satellites.
A rover is a piece of machinery, you don't teach it.
See the Web Link 'Rover - Space Exploration - Wikipedia' to the left for information.
Thousands of orbiting satellite, 10-25 rovers, 4 deep space probes
· rockets · Rovers (US exploration of Mars)
· Rovers (US exploration of Mars)
Rovers
Both Spirit and Opportunity were launched into space by Delta 2 rockets. Links can be found below.