NASA and NASA have discovered a white dwarf on the edge of the whirlpool galaxy NGC 2525, 70 million light-years away, and have continued to observe the end of its life. Data from the Hubble Telescope show that at the beginning of the supernova explosion, the brightness was 5 billion times that of the sun, but its light was almost disappeared after a year. It is reported that NASA and ESA began to observe this supernova named Sn 2018gv in February 2018, which lasted for nearly a year. When a star shines billions of times as much light as the sun in a few days, you know it’s running out, NASA said in a statement on Thursday. < / P > < p > “the supernova explosion is not only a brilliant cosmic fireworks, but also a milestone to measure the distance between galaxies. We can use this to calculate the galloping speed between galaxies, and conversely, we can estimate the age of the universe. < / P > < p > finally, NASA shared a time-lapse video recording the brightness change of Sn 2018gv supernova, which made us realize strongly that even the stars in the sky will not shine forever in space. Apple extends AppleCare + purchase period: users can decide within 60 days