Pertaining to how the characters in source code are translated into tokens that the compiler canunderstand.linkerA module that builds an executable, complete program from component machine code modules.The Java(TM) linker creates a runnable program from compiled classes.
Artificial satellites are used to study the Earth, other planets, to help us communicate, and even to observe the distant Universe. Satellites can even have people in them, like the International Space Station and the Space Shuttle. The first artificial satellite was the Soviet Sputnik 1 mission, launched in 1957. Since then, dozens of countries have launched satellites, with more than 3,000 currently operating spacecraft going around the Earth.
Explorer 1 was the first U.S. satellite and the first satellite to carry scientific instruments. Explorer 1 was the United States' first satellite in space. The 1958 launch of the satellite â twice the size of a basketball â was an important moment for the country, as the Space Race with the Soviet Union was just beginning.