Matt Russo : What does the universe sound like? A musical tour

Matt Russo at TEDxUofT (transcript)
What does the universe sound like? A musical tour
Summary
This is a story I haven't understood completely.
In the first place, I thought that the subject was the universe sound. It means
I didn’t understand that in the title, the verb was “sound” or “like”. Ｈahaha～～

It’s strange that the speaker is an astrophysicist and a musician, isn't it?

He tells us that planetary orbits have the hidden rhythms and harmonies, outer space is not really silence and not lifeless place also, and it produces its own unique melody. Music and astronomy seem to have deep connections, there is geometry in the humming of the strings, and there seems to be music in the spacing of the sphere there. What? What does it mean?

And then he said that he got to the TRAPPIST-1 system that I heard for the first time.
This is an explanatory system discovered last February of 2017. It seems to be seven Earth-sized planets orbiting a star.

I didn't understand what the TRAPPIST-1 is something to hear, however, its sound fascinated us, it’s very beautiful, and it’s enough worth.

No one is creating the pitches or rhythms and it's just brought into the human hearing range.
One tone beats out a rhythm. It's simple and two tones join. Three, four, five, and six tones join. It just only joins but it doesn't create and it's not created. Each sound is simple and just beats out the same pitch. And after all, when seven planets have entered, we can hear a drum for every time two planets align.

This is what the hidden rhythms and harmonies that the planetary orbits have, isn't it?
I feel that it’s like the life of ourselves and consonant is great.

Our planet has had a lot of things that we don't know. From now, Like this TRAPPIST-1 of the resonant chain and K2-138, new things seems to be discovered also.

Words in this story
resonant /adj/ (of sound) deep, clear, and continuing to sound or ring.
consonant /noun/  in agreement or harmony with.
astronomy /noun/ the branch of science that deals with celestial objects, space, and the physical universe as a whole.