Space is full of energy, ie vibrations. As every Sun, Planet, Moon and other objects in space move, they cause even more vibrations. Some of these vibrations created by the planets/ stars etc are visible as light. Some energies released are beyond the scope of visible light and are seen in the ultra-violet and infra-red spectrum.
Some vibrations are completely astral, eg the energies released by the Lunar Nodes, Rahu and Ketu. These cannot be sensed by any physical sense organ but they act on the sub-conscious levels and the sookshma-sharir/ subtle body.
The various probes and satellites that zoom through the space are capable of capturing radio emissions from astronomical objects. These vibrations in space are actually inaudible to the human ear. We humans can can ‘hear’ sounds within the range of 20 to 20000 Hertz with our ears. And there is no audible sound in space because sound needs a medium to pass through. ut our modern scientists have developed methods to convert these space vibrations into sounds which we can now listen to.
You will need to hear this first (do use headphones if you have them with you). The sounds that our Sun, the planets of the solar system and our Moon make.
The Sun sounds something like a huge generator, which it technically is. Or like a OM, deep down somewhere in his heart. Mercury sounds very ‘busy’, lots of sound, in several different pitches. Just like your chattering siblings, perhaps? The most beautiful sound is Venus. Most clearly resembling the deep gonggg of a bell, it is the closest to ‘Om’. I have mentioned in my several posts that Venus is the real Moksh-karak. The real Guru of the esoteric and the spiritual who brings you to yourself. Om.
Earth, our home planet, has a very busy sound signature, several sounds and with a sense of speed. We all live on Earth all the time so this is the sound energy that we are all deeply linked to. Our Moon has a very gentle sound, quite pleasing. Moon represents your emotional states, also the nature and nurture you receive in life. With Mars, you can just about sense the suppressed deep energy in the sounds he makes. Maybe these are the drums of war! Jupiter now has a soothing bell-like sound of Om. He is rather sedate and quite peaceful, the Dev-Guru. Wisdom, knowledge and protection is his domain and this is reflected in his sound too, mild and benevolent. But then at the last, Saturn makes a rather scary sound, like something from a suspense movie. Suits his image, he is the Lord of Karma, he will make you work hard to pay back what you owe.
These 7 are the Graha of Jyotish, we do not consider the planets beyond Saturn as Graha, there is a mathematical reason to this. (post here).
These sounds and the light that we sense from the Sun and the planets is a part of the energy they radiate out into the universe. And what is Jyotish? Essentially just another way of recording, interpreting their energies and the effect they have on our lives.
(One of my seniors in office pointed out this topic to me, I felt it to be interesting, so put it in a post.)