They finally reach the present day, wrapping up with satellites.

Another important factor with satellites is the cost of the launch.

It was the result of the American obsession with satellites and technology.

"The only thing with satellite is there are so many channels that I can't follow them all."

Political figures with hot lines and satellites at their disposal.

Some critics question whether communication with such satellites would be possible in a nuclear war.

I gathered this involved more than just searching a section of space until you found stars with satellites.

With satellites, scientists now keep close watch of changes to Antarctica as they occur.

On the other hand, monitoring the earth with satellites results in a second huge data stream for climate research.