air and water
You need rockets so you can travel to space and visit other planets. Without rockets we would know nothing about astronomy.
Space travel is done by means of rockets.
space
electronic rockets
The purposes of rockets are to travel to space, to collect information and research.
They travel by rockets
Rockets are almost always used in space travel. It takes the thrust of the rocket to push the satellite or capsule to it's destination. 99% of the time, a rocket is used in space travel.
Rockets are almost always used in space travel. It takes the thrust of the rocket to push the satellite or capsule to it's destination. 99% of the time, a rocket is used in space travel.
By rockets
Astronauts are people who travel in rockets to space.
So far, technology has only allowed us to travel to space in rockets/space shuttles.
Rockets aren't necessarily good for space travel they are a necessity. You cant leave earth without a rocket... you wont be able to break through the atmosphere.