The rocks were so different from those known to science that the researchers even had to create brand new names to classify them. Within the rest of the dead stars, the researchers found the remains of exoplanets made of alien rocks never seen on our planet or the rest of the solar system. The researchers found that only one of the white dwarfs contained the remains of exoplanets with a similar geological make-up to Earth. Researchers worked out the ratio of different elements in the white dwarf atmospheres by analyzing the light given off by the stars then, they calculated the most likely makeup of the minerals that would have formed the obliterated alien worlds. And so, the atmospheres of these white dwarfs contain the guts from the alien worlds they destroyed. As these stars were dying and transitioning into white dwarfs, they ripped apart their orbiting exoplanets. In the new study, researchers looked at 23 white dwarfs - the small, dense remains of dead low- and medium-mass stars - within 650 light-years of the sun.
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