Majors

aspiring nasa physicist

[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]

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.

[relativelymargo2511]

variable stars

variable stars are stars whose visibility and brightness as seen from earth varies over time.

this can be due to certain internal and external factors. for example, its luminosity changing as the star swells and shrinks, or another celestial object eclipsing the star, respectively.

[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]

Did you know?

the colour of a star actually depends on its temperature, due to something known as black body radiation. a perfect 'black body' absorbs all radiation and is the best emitter.

hotter objects emit electromagnetic waves with shorter wavelengths, and slightly colder objects emit longer wavelengths (which could be seen as a bit counterintuitive).

so, blue stars are hotter than red stars.

[relativelymargo2511]

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