The Planets by Holst is described by Wikipedia thusly:
The Planets, Op. 32, is a seven-movement orchestral suite by the English composer Gustav Holst, written between 1914 and 1917. In the last movement the orchestra is joined by a wordless female chorus. Each movement of the suite is named after a planet of the Solar System and reflects its character according to astrology.
I would say it's seven "songs" from an album I had in my teens. So it's music that is supposed to capture the character of each of seven planets in our solar system.
Historically, a drummer helped soldiers march in step and rowers row in sync. They used a fairly large drum with a deep tone.
Sound is vibration and you not only hear a deep tone like that, you feel it. This means it serves as troop coordination even over the din of war.
Deep tones can travel long distances and both whales and elephants use deep tones to communicate with others of their species very far away.
Because sound is vibration, it can do more than just communicate.
My oldest son has serious health issues. He slept with me as an infant because laying against me allowed my heart and lungs to physically "squeeze" his, making his heart and lungs step to their beat, reducing the energy he needed to provide, calming things down and slowing things down while he breathed deeper and more efficiently.
It's not only easy to get in step with the beat of the drum, it's hard to resist it.
You can record music as an audio tape of the sound. You can also record it as written musical notes and lyrics.
So Holst's The Planets can give you a feel for the type of energy of each planet.
Astrology is about trying to understand the beat of the different planets and how we step to their beat here on Earth. The vibrations they give off are felt elsewhere in the solar system and having some idea of how each behaves in that regard can be useful information.
See also: Understanding the Planets