show her im the judgement call, the one one who makes her kingdom fall!

hello everypony heres another yap you cannot avoid! todays subject? PULSARS AND QUASARS! "but hoyeon!! arent these the same!" no, actually, my little fledgling! a pulsar is a neutron star (the core of a massive star that went supernova and exploded) and a quasar (quasi-stellar radio sources) is a supermassive blackhole that is the nucleus of a galaxy which is very active and luminous!

first, we'll start with pulsars. pulsars, by definition, are; "highly magnetized rotating neutron stars". pulsars are one of the parts of a source for ultra high energy cosmic rays. pulsars are called the 'lighthouses of space' but dont worry! theres no scary old person holding a staff exiting it to tell you to run from your new home! (very specific reference). they emit beams of electromagnetic radiation out of the magnetic poles on its core body. it (the radiation) can only be observed when its directly facing the earth! of course, it's not dangerous when it is since they're usually long long ways away! pulsars have dense, short rotational periods which creates a very precise interval between pulses that can range from milliseconds to seconds (sounds like not a lot but can be!) their highly regular pulses are very useful for astronomers (and me of course). observations of a pulsar in a "binary neutron star system" (binary star system composed of a neutron star and a pulsar) were used to (indirectly) confirm the existence of gravitational radiation

now onto quasars! these are abbreviated as QSO and are labeled as "quasi-stellar objects". the term quasar originated as a contraction of "quasi-stellar (meaning star-like) radio source" because they originally identified quasars as the happens of stars due to the visible wavelengths which looked like star-ish points of light. They are extremely luminous AGN (active galactive nucleus). they are powered by supermassive black holes with a mass usually ranging from millions to tens of BILLIONS of solar masses (mass of the sun). they are surrounded by a gaseous accretion disc (wouldnt wanna be smelling it [youd probably die being close to it anyway.]) gas in said disc (which is falling towards the black hole) will heat up and releases energy in the form of electromagnetic radiation (remember this from the pulsars?). the radiant energy from them is big. like. big big. like. huge. like. yeah you get it. quasars are categorized as a subclass of the general category of AGN (active galactive nucleus). some of the most powerful quasars have luminosities thousands times greater than galaxies like our own milkyway. quasars are usually in the center of galaxies (theyre.. kinda attention seekers lowkey. being in the center) and sometimes when they host galaxies they kinda tweak out cheat on their galaxies and interact and or sit with merging galaxies

thanks for listening i dont wanna type no more