Recently, the Universe seems to be challenging a person by showing something that we could not have imagined before.
Now science admits the existence of bluenets (planets that formed around a black hole) of quark planets that can be less than a meter but hotter than many stars of quark stars boson star of gray hole electroweak stars MECO (Magnetospheric eternally collapsing object) dark planets, etc.
This is a topic to dream up, but to dream up scientifically
What else do you think is theoretically possible in the Universe about which we can not guess?
P.S stars from hypothetical photon matter, gluonium stars are all boson star.
Photon and gluons belong to bosons.