![]() Scientists also sometimes study the movement of objects - if they seem to be pulled weirdly, a black hole could be the culprit. Sometimes black holes also spit out giant bursts of charged particles, which is, again, detectable by our instruments. ![]() This process heats the stars, causing them to emit X-ray signals that are detectable by telescopes. For example, a black hole gobbles up stars that veer too close to it. Rather, they relied on indirect evidence - behavior or signals coming from other objects nearby. ![]() If this core was over three times as massive as the sun, his equations showed that the force of gravity produced a black hole, according to NASA.īut until yesterday (April 10), scientists couldn't photograph or directly observe black holes. Before this image, how did we know black holes existed?Įinstein's theory of relativity first predicted that when a massive star died, it left behind a dense core. Also, black holes are typically shrouded by material that can obscure the light surrounding the black hole, they wrote. ![]() For instance, taking an image of the black hole at the center of our Milky Way, which is thought to be around 4 million times as massive as the sun, would be like taking a picture of a DVD on the surface of the moon, Dimitrios Psaltis, an astrophysicist at the University of Arizona, told Vox. Why haven't we seen an image of a black hole before?īlack holes, even supermassive ones, aren't that big. ![]()
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