The Milky Way star exploded three times and remained bright, scientists at the University of Arizona want to break it

The Milky Way star exploded three times and stayed bright again. Scientists at the University of Arizona want to break it. The Milky Way star Eta Carinae is very astronomical...

The Milky Way star Eta Carinae is very troublesome for astronomers, because this star has exploded at least three times. , after each explosion, not only did it not collapse like other exploding stars, but it became brighter, which puzzled scientists and made them work harder to study.

Eta Carinae is a high-luminosity blue variable star (LBV) located in the constellation Carina. It contains the brightest known objects in the Milky Way, 7,500 to 8,000 light-years away from the Earth. There are at least two stars among them. One star is about 150 times as massive as the sun and more than 1 million times as bright as the sun; the other star is also huge, about 30 times as massive as the sun. Scientists from the University of Arizona found that Eta Carinae's star had exploded at least three times, but could not explain the cause. Gizmodo Australia reported on September 5 that scientists analyze the conditions for a star to explode in two ways. First, the nuclear fusion activity of the star stops, and it cannot maintain the shape of the star and collapses. Another way is that the star shrinks in size into a white dwarf, and finally explodes and dies due to excessive density. However, scientists found that the cause of Eta Carinae's stellar explosion was completely inconsistent with the above two methods. According to historical records, in the mid-19th century, Eta Carinae exploded, and its brightness increased abnormally, so much that it exceeded almost all other stars in the sky, so it was called the "Great Eruption" and formed the Homonculus nebula around it. However, Eta Carinae did not die, and became brighter in the 1890s and mid-2000s. Especially between 1998 and 1999, the brightness of Eta Carinae suddenly doubled. Megan Kiminki, a researcher at the University of Arizona, said: "We call Eta Carinae the supernova magician. It gets brighter, which means it erupts a lot of material, but it still exists." Moreover, based on astronomical data, the researchers found that Eta Carinae also exploded much earlier, such as in the 13th century and the 16th century. The report said that the reason for the multiple explosions of Eta Carinae has not yet been solved, but it is speculated that its explosion must be connected with other events in the universe. Perhaps it sent us some kind of message 7,000 years ago, but we do not understand its meaning.