Personally, I find Brown Dwarfs to be absolutely fascinating. An object that isn’t quite a planet and isn’t quite a star, but something in between.
What would one even look like? Would it look like a gas giant that’s glowing red, along with swirls of gas in its atmosphere like Jupiter? Or would it resemble a star and have a fiery surface like the sun? I prefer to imagine them as glowing gas giants but I don’t know how realistic that is.
Gas giants in general are fascinating to me as well, I really hope we send a probe into one of the gas giants with a camera before I die. I’d absolutely love to see what it looks like inside a gas giants atmosphere before the probe gets crushed by the increasing pressure as it descends.
Black Holes are infinitely fascinating!
They’re ’a thing’ we knew nothing about until Einstein wrote a paper, and even though his own math showed their existence, he doubted that they could be real.
Turns out that they are, and that they form the structure of the entire universe.
That’s my object.
My favorite thing is Quantum Field Theory! You know the field of magnetism, you played with it as a kid when you got your hands on two magnets the first time.
Turns out every particle in the standard model has its own field, and an excitation of that field manifests as that type of particle.
David Tong explains it masterfully: https://youtu.be/zNVQfWC_evg
As does HOTU: https://youtu.be/UYW1lKNVI90
EDIT: Both links above are 1+ hours each, and done in layperson terms. No degree needed, just a desire to learn something fascinating.
I always get the impression magnetism and the force keeping particles together must be similiar somehow.
The “force” keeping particles together are other particles! With their own quantum fields even.
Here’s an 8 minute primer on the Standard Model: https://youtu.be/XYcw8nV_GTs
Or our representation of them, so that we can imagine them?