It's existence in general is just speculation. It's more of a temporary answer to fill in the gaps between what we currently think is true according to science. We base most of our astronomical models on Scientific methods that are proven to work in our universe, which has worked out so far. However, there are a few phenomena that are as of yet unexplainable. One of which is gravitational fluctuations in different places in our universe, despite us not being able to detect any matter in those places, which doesn't make sence to our scientific models. So we basically invented the concept of dark matter as to make it make sense of why there are gravitational dimples in the fabric of space time in those areas. Theoretically: If dark matter exists, and it would work the way we think it does, that would explain the things we cannot explain at the moment, and it would mean our understanding of the fundamentals of the universe are correct

Orestes - a perfect circle, wings for marie - tool, daughters - john mayer, it's so hard to say goodbye to yesterday & end of the road - boyz II men, separate lives - Phil collins, shape of my heart - sting, nutshell - alice in chains, father and son - yusuf / cat stevens, old and wise - the alan parsons project, con te partirò - Andrea Bocelli, dido & aeneas 626 act III, all my tomorrow - grover washington jr., Lover you should've come over & hallelujah - jeff buckley, musica é - Eros Ramazzotti.

There are probably some I forgot, but this is definitely a good few. Give them a try!

I was listening to this while scrolling and now it pops up

Definitely one of my most emotional songs, not just because it is, but also because it has even more special meaning to me because of how it came into my life

Orestes - A perfect circle

Well first of all, matter doesnt compress in that way. A ring would be far too thin and mostly empty to form. Not only that but tidal forces and impacts would damage a ring very quickly. Technically a solid ring around a planet is possible, but hardly if ar all through natural formations, and would probably have to be made