The act or process of driving, or causing something to move, forward or onward
Newton's Third Law of Motion
For every force, or action, there is an equal or opposite force, reaction.
what most fuels in rockets produce in order to propel the rockets
Robert H. Goddard
The American scientist who experimented with rockets and liquid fuels in the 1920's.
The Russian scientist who came up with the idea of the multistage rocket in 1902.
Liquid Rocket Fuel
A fuel which enabled rockets to travel further.
Rockets which have a number of fuel containers. After the fuel in a container is used, the container falls off of the rocket.
Any natural or artificial object that revolves around another object in space.
the first human-made satellite (created by the Soviet Union)
the first U.S. satellite in space
the first human to go into space ( he was a Soviet cosmonaut; he orbited the Earth; he did this on April 12, 1961)
Some of the Uses of Artificial Satellites
telephone calls; broadcasting television programs; photographing items on Earth and in space; navigation; collecting weather data
an orbit in which a satellite revolves around the Earth at the same rate at which the Earth rotates; consequently, from Earth, the satellite appears to stay in one place.
an artificial satellite in which people can live
the first human-made space station (produced by the Soviet Union and launched in 1971)
the U.S.'s first space station; launched in 1973
the Soviet Union's space station in the 1980's
International Space Station
a multi-national space station created by 16 different countries with operations continuing until at least 2015
the U.S.'s reusable space vehicle which was developed in the late 1970's
The First Rockets
built by the Chinese around the year 1000 and used gunpowder as a fuel