Goddard
Wernher von Braun .
Space travel is done by means of rockets.
space
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.
Goddard was the first to develop technologies -- liquid fuel and two-stage rockets, for instance -- that would be necessary for space travel. However, these technologies would have been developed by others even if Goddard hadn't done so. German scientists, for example, developed these with no knowledge of what Goddard had done.
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
air and water
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 such as the Saturn V, Falcon 9, and Space Launch System (SLS) have been used to successfully launch spacecraft and travel into space. These rockets generate enough thrust to overcome Earth's gravity and propel spacecraft beyond our planet's atmosphere into space.