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품번
Ji Man-man claimed that the photo was taken by North Korean
soldiers, Kim Chang-sik, while he was riding a machine
May 13, 2022
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Facts Ride
Don't be fooled by the name: a black hole is anything but empty space. Rather, it is a large amount of matter packed into a very small area - imagine a star ten times more massive than the Sun crammed into a sphere the size of New York City. As a result, nothing, not even light, can escape the gravitational field. NASA instruments have recently painted a new picture of these strange objects, which many consider to be the most fascinating objects in space.The concept of a massive and dense object in space that prevents light from escaping has been around for centuries. Black holes were most famously predicted by Einstein's theory of general relativity, which demonstrated that when a massive star dies, it leaves behind a small, dense remnant core. The force of gravity overwhelms all other forces and creates a black hole if the core's mass exceeds about three times the mass of the Sun, according to the equations.Scientists can't see black holes directly with telescopes that detect x-rays, light, or other forms of electromagnetic radiation. We can, however, infer the presence of black holes and study them by observing their effect on nearby matter. If a black hole passes through an interstellar cloud, for example, it will draw matter inward in a process known as accretion. If a normal star passes close to a black hole, a similar process can occur. In this case, as it pulls the star toward itself, the black hole has the potential to rip it apart. As the attracted matter accelerates and heats up, x-rays are emitted and radiate into space. Recent discoveries provide some tantalising evidence that black holes have a dramatic influence on their surroundings, emitting powerful gamma ray bursts, devouring nearby stars, and spurring the growth of new stars in some areas while halting it in others.
https://factsride.com/black-hole-facts/
#factsaboutblackhole #blackholefacts #interestingfactsaboutblackholes
May 14, 2022
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