>>13456578They are astronomical objects that are unlike anything else in the sky and it's pretty obvious why anybody would find them cool.
>they can have a mass of a star or mass of a galaxy>they can have a bright accretion disk and a relativistic jet>they produce relativistic effects such as gravitational lensing and gravitational waves>they warp light in such a way that you can see everything in front of it and behind it simultaneously>they have an orbit for light called the photon sphere>they have an event horizon beyond which nothing can escape its gravity>they have a singularity which is an infinitesimal point in space where all the mass of a black hole is located>they cause frame dragging and have an ergosphere where it's impossible to stand still if they're rotating>they spaghettify objects that come near it>they cause extreme time dilation and redshift to objects that fall into it>they flip time and space for objects that fell in so no matter which way they try to go they always fall towards their singularity>they slowly evaporate through Hawking radiation>they can be used to extract a lot of energy through Penrose process if they're charged or rotating>they're only characterized by mass, charge and spin by the no hair theorem producing various types of black holes (Schwartzschild, Reissner-Nordstrom, Kerr and Kerr-Newman)>there may be naked singularities if cosmic censorship hypothesis is not true>they may be wormholes to a parallel universe>they encode their information on the surface of their event horizon and the universe may be a hologram encoded on the surface of a black hole.>they have been proven to exist and a picture was taken of one.A typical star just shines bright and doesn't usually express these relativistic properties unless it's a pulsar, magnetar or a regular neutron star.
>inb4 your not an astrophysicist pseudDon't need to be a car engineer to love cars.
>inb4 WOW I FUCKING LOVE SCIENCEYes.
