#physics chat

[relativelymargo2511]

will you be the particle to my antiparticle *lip bite* (physics rizz)

[relativelymargo2511]

the oppenheimer movie was absolutely UH-MAZING !!! actors, science, editing, everything

[relativelymargo2511]

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!

the image depicted is a supermassive black hole at the centre of the M87 galaxy - around 54.8 million light years away, and harnessing around 6.5 billion times more mass than the sun.

[relativelymargo2511]

BLACK HOLE formation in a nutshell

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.

alternatively, black holes can also be formed from a neutron star that accretes more mass and further collapses.

[relativelymargo2511]

galilean invariance ‼️

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

this means that if you are stationary or moving at a constant speed, newton's laws will apply. for example, say you were inside of a train carriage that had no windows and went at a constant speed, and you performed a newton's laws experiment. the results of these experiments alone could not tell you if the carriage was moving or not, because a person who performed the same experiment in a stationary classroom would get the same results.