Question

there are antennas and there are \antennas.\ satellite dishes installed on individual homes track television signals sent from satellites that are orbiting earth. these satellites are in the sky about 22,000 miles from earth. each satellite revolves around earth once every 24 hours, the same speed that earth turns. actually, the satellite keeps pace with earth. that is why a satellite dish placed on a home needs to be aimed only one time toward the satellite sending the signal. that is also why the dish is relatively small in size. the farther away the transmitting satellite, the larger the antenna that picks up the signal must be. if the satellite sending the signal were placed on the moon, the dish receiving the signal would have to be the size of a two - story building.
which statement best identifies two central ideas developed in the passage?
satellites have made long - distance communication easier. satellites in deep space will become more common in the near future.
satellite dishes are vital for space exploration. satellite dishes have revolutionized the communication industry.
the dsn has facilitated the transmission of data gained from space exploration. dsn technology is dependent on space exploration for innovation.
the dsn created the necessary technology for successful space exploration. the edge of the solar system defines the limit of effective long - distance communication.

Explanation:

The passage discusses how satellites have made long - distance communication easier, and how satellite dishes are vital for space exploration. It also implies that satellites will become more common in the future.

Answer:

Satellites have made long - distance communication easier. Satellite dishes are vital for space exploration. Satellites will become more common in the near future.