The first signals were sent when we started using radio with significantly powerful signals. Though these were not directed to other worlds they nevertheless form an ever expanding sphere through space.
it receives signals and sends out signals
1981
Crazy
once its in space, people on earth control it by sending radio signals and move it around the red planet. there are also those that don't need controlling because they are programed to pick up samples and keep moving, and pick up sample; and move; sample; move; sample; move.
Tasks that are performed by sending people into space, as opposed to tasks performed by sending autonomous or robotic vehicles to do the job.
It tells you about how space can have effect on animals and how.
Plenty of signals have been detected from space - but none have been inferred to have come from an intelligent source. (IE Aliens)
Microwave signals are being sent through space through electromagnetic waves and not through optical waves. This type of signal is being used mainly in communications because of its narrower beams compared to other signals.
As the space shuttle is a reusable it is now to old.
Earth has been broadcasting radio signals into outer space since the late 1800's.
i have no clue;)
Yes