Cassiopeia A. This is probably one of the most famous supernova explosions in our universe. And astronomers tell us today that this nebula doesn’t expand evenly. Blame it, perhaps, on the collision.
Cassiopeia A is about 11,000 light-years away from our Earth. what is that leftone of Red whose light reached us around 1670. At least that’s what the researchers concluded from their analysis because Cassiopeia A is not visible. naked. And this Even the astronomical instruments of that time were not enough to see it. In any case what we know is that Created by the supernova explosion of this supergiant star, about 30 million . has a crazy temperature of ,
have already been able to establish that this nebula is spread by the explosion of the star that gave birth to it Average between 4,000 and 6,000 kilometers per second. In fact, Cassiopeia A is about 16 light-years across today. Really ? Data collected over almost 20 years by Today it seems that you want to provoke trouble.
From(Netherlands) have noticed something really amazing about Cassiopeia A. in its western part. Or to the right of the images, if you prefer. The interior of the nebula appears to be moving inward, rather than expanding. Furthermore, astronomers’ measurements of the acceleration – or deceleration – of the external shock wave suggest that, in the western part, it is accelerating rather than decreasing.
Collision with matter ejected by the star itself?
this is wonderfulAccording to astronomers, the repetition can be explained in two ways. A very brief episode of extreme mass loss or a kind of void in the very material of a supernova produced by a nebula collision. “with some”, And it seems that models want to privilege this last track because it would also explain the observed acceleration ,
recent work(Italy) indicates the collision of the remnants of the star into a denser region and dust. Or even, a kind of shell – in this case partial – of particles. It may have been created by the star already at the end of its life, but as soon as it made an explosion before its supernova explosion gas particle constant.
Researchers regret not knowing about the star that gave birth to Cassiope A. Its shape or its spectral type, for example, may clarify the question. But maybe they can still learn more very soon. Thanks towho can see Before the end of this year on Cassiope A.
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