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The United States and the USSR were involved in the space race. Each one was trying to be the first to explore space with artificial satellites and manned spacecraft.
Unmanned - Space probes are a form of robotic spacecraft.
X33 concept space
there is no man in the space craft
The most obvious answer to your question is the fact that people have to return to earth, while an unmanned craft can stay in space infinitely. Manned spacecraft require things like oxygen, water, food and communications equipment, none of which are required by an unmanned spacecraft. That means unmanned spacecrafts can be sent into space for a fraction of the cost of a manned spacecraft. So basically, it's much cheaper and safer to send unmanned spacecrafts to explore the universe.
The United States and the USSR were involved in the space race. Each one was trying to be the first to explore space with artificial satellites and manned spacecraft.
Unmanned - Space probes are a form of robotic spacecraft.
X33 concept space
there is no man in the space craft
A space shuttle is a reusable spacecraft meant for manned missions into orbit.
The most obvious answer to your question is the fact that people have to return to earth, while an unmanned craft can stay in space infinitely. Manned spacecraft require things like oxygen, water, food and communications equipment, none of which are required by an unmanned spacecraft. That means unmanned spacecrafts can be sent into space for a fraction of the cost of a manned spacecraft. So basically, it's much cheaper and safer to send unmanned spacecrafts to explore the universe.
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The most recent manned mission into space was Soyuz TMA-19.
Space Ship 1
Humans have build a wide range of spacecraft in their voyage of space discovery, some manned and some not. A few of these include Vostok, the first manned spacecraft and the Colombia Orbiter which is considered a space plane.
scientists use spacecraft without people to explore space because scientists need to know more about space and the solar system
Spacecraft have been linking up in space since the 1960s. An American and a Soviet spacecraft linked up in 1975 for the first time.