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.
To the river I am going bringing sins I cannot bear. Come and cleanse me, come forgive me Lord I need to meet you there. In these waters, healing mercy flows with freedom from despair. I am going, to that river Lord I need to meet you there. Precious Jesus, I am ready to surrender every care. Take my hand now, lead me closer Lord I need to meet you there. Come and join us, in the river Come find life beyond compare. He is calling, He is waiting Jesus longs to meet you there. He is calling, He is waiting Jesus longs to meet you there.