Read the text. Fill in the blanks with words from the list. Use each word only once. There are three extra words in the list.

A satellite is an object that orbits ... object. In space, satellites may be made by man, or they may be natural. The Moon is a natural satellite that orbits the Earth. ... man-made satellites also orbit the Earth, but some orbit another planets, such as Saturn, Venus, or Mars. Satellites are used for many ... . there are weather satellites, communications satellites, reconnaissance satellites, astronomy satellites and many other ... .
The world’s first artificial satellite, the Sputnik 1, was launched by the Soviet Union on October 4, 1957. This surprised the world, and the United States quickly worked to launch their won satellite, starting the space race. Sputnik 2 was launched on November 3, 1957 and carried the first living passenger into orbit, a dog named Laika. The United States launched their first satellite, called Explorer 1 on January 31, 1958. The UK launched its first satellite in 1962.
Nowadays, thousands of satellites are orbiting the Earth. Some satellites, especially space ... , are launched in parts and assembled in orbit.