One is the visible spectrum, as mentioned above, and the other is the radio spectrum. However, not all of the radio spectrum is useable for space communication. The available window spans from about 30 MHz to 30 GHz, although these are not absolute end frequencies.
Isaiah 43:2 (BBE) When you go through the waters, I will be with you; and through the rivers, they will not go over you: when you go through the fire, you will not be burned; and the flame will have no power over you.saiah 43:2 (CJB) When you pass through water, I will be with you; when you pass through rivers, they will not overwhelm you; when you walk through fire, you will not be scorched-the flame will not burn you.
Stay in my dream, so I can take you with me. Sing me a song, that I'll never forget. Remember the day, the wind and the sunshine. The highway of love, running fast they say. And into the dark, at 90 miles an hour. The flash in the night, was the last thing I could see. Sing me a song, the last one in my life. My time has come, life has been too short. Stay in my dream, so I can take you with me. Sing me a song, that I'll never forget. See these hands of mine, see how they're trembling. But power has gone and right here at the end. I used to be wild, I was one of the living.