Why can everyone recieve “satellite TV” or NASA communications by connecting a satellite antenna to TV?
Neither NASA nor satellite TV broadcasts at frequencies your television can receive. To receive satellite TV, you need a dish antenna, a satellite-band receiver, a decrypter with current key, and a converter to output video to your TV. You can listen in on NASA radio communications if you have the appropriate receiver, know the frequencies being used, and are in the right place to receive the signal.