#physics chat

first black hole photo 📸

in 2017, a decade of work at the EHT (event horizon telescope) finally paid off when they were able to take a photo of a real black hole. the EHT is a combination of eight telescopes spread worldwide, which were all used to piece together images of black holes - sort of like an earth sized telescope!

black holes will only form from stars that are massive enough - as in mass, not size.

small stars expand into red giants at the end of their life, and then they puff out their edges and they become a white dwarf (which are also pretty dense).

large stars, however, expand into red SUPERgiants, and terminate their life via a cataclysmic, bright supernova. the remnants of the supernova can form nebulae, and super dense celestial objects known as neutron stars. but they can also form something else, something much more ominous; a black hole.

galileo galilei postulated that in EVERY inertial reference frame, the laws of motion held up.