So far, thousands of planets have been found outside the solar system, and it is estimated that there are more than 40 billion planets in the whole galaxy. Now, for the first time, humans have found traces of planets outside the galaxy. The diameter of the Milky way reaches or even exceeds 100000 light-years, while other galaxies are at least tens of thousands of light-years away. It is not easy to distinguish the stars in them, let alone the planets that do not emit light. The historical discovery of extragalactic planets, named m51-uls-1b, is located in the spiral galaxy M51 in the constellation Ursa Major. It is 23 million light-years from earth, slightly smaller than Saturn, and moves around a pair of binary stars, about 10 astronomical units away from the orbit center. < / P > < p > human beings can find that it has a lot of lucky elements, because one of the binary stars around it may be a neutron star or even a black hole, which is crazily devouring the material of the companion star and releasing a lot of energy, becoming a shining X-ray source, which is equivalent to 1 million times of the full band electromagnetic wave of the sun. Considering that the Chandra X-ray telescope still has a large number of observation data waiting for analysis and mining, I believe that the second and the third Extraterrestrial planets won’t wait too long. Privacy Policy

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