Is There Anything That We Can't See?

Cassandra mat some of the things in the universe can't be s with the naked eye. You've written a book about some of them recently. Why do we need to look at something that we can't see? Well, the quick answer is that there is an awful lot more that we can’t see than we can. The full sectrum of light that arrives from the universe is about 65 octaves thit's nine grand pianos standing in ta line rad if you imagine all those ig pianos being played at once, and could only hear one central octave, you would miss almost all the music. That's the problem with astronomy. If you're only looking with your