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Space Flight is the act of travel to or through space. Spaceflight can occur with spacecraft that could, should or not, people on board. Examples include manned Russian Soyuz program, the program US Space Shuttle and International Space Station in progress. Examples include unmanned space probes leaving the Earth's orbit, and satellites in orbit around the Earth, such as communications satellites. These work either by telerobotic control or are totally autonomous.
Space Flight Space used for research, and also in commercial activities like space tourism and satellite communications. Other non-commercial uses of spaceflight include space observatories, reconnaissance satellites and other remote sensing satellites.
A spaceflight typically begins with the launch of a rocket, which provides an impetus to overcome gravity and propels the spacecraft from Earth's surface. Once in space, the movement of a ship in two, and when unpropelled drive is covered by the area of study called astrodynamics. Some satellites in infinite space some disintegrate during atmospheric reentry and others reach a planetary surface or the moon landing or impact.
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