I was watching a video and it said that the meteor that wiped out most life on earth, when it killed the dinosaurs was equivalent to 5 million atomic bombs. The generality of that rule coupled with inconsistent observation should give you an idea as to how well-defined and locked-down the definition of 'hypernova' is, when you compare it to how much detail is in a simple explanation of a supernova. Nova and Supernova are events taking place in our galaxy on a regular basis. Rules: https://www.reddit.com/r/askastronomy/about/rules And a Type III is the collapse of a super big star, maybe 60 times Sol's mass. So up went a number of satellites to monitor the situation, and flash went a bunch of gamma rays from the other end of the universe. But many stars are actually gravitationally bound to other stars, and it's common to find 'binary' systems where there are two stars. Current theory suggests that dwarf novae result from instability in the accretion disk, when gas in the disk reaches a critical temperature that causes a change in viscosity, resulting in a temporary increase in mass flow through the disc, which heats the whole disc and hence increases its luminosity. Creative Commons Attribution/Share-Alike License; (astronomy) The gravitational collapse of a massive star to form a black hole. You are then also responsible for looking into the broader field to understand whether you're asking the right type of question in the first place. In this case a massive star (>30 solar masses) collapses to form a rotating black hole emitting twin energetic jets and surrounded by an accretion disk. Text is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply. Een hypernova binnen enkele honderden lichtjaren van de aarde kan al het leven hier vernietigen, een supernova zou daarvoor heel veel dichterbij moeten zijn 5. Eine Hypernova stellt das obere Ende der superleuchtkräftigen oder superhellen Supernovae dar. A very rough scale: BRIGHT: Nova: A star showing a sudden large increase in brightness, slowly returning to original state over a few months. Novae tend to repeat, as the white dwarf continues to siphon gas from its companion. ", New comments cannot be posted and votes cannot be cast, More posts from the askastronomy community. They are all considered to be cataclysmic variable stars. See /r/telescopes! Wat zijn de wezenlijke verschillen? In reality, regions outside the core will also become hot enough at various stages to begin fusion as well, and in the late stages of this whole process an illustration of all these regions begins to look like a well-licked jawbreaker. First it goes red giant, then it supernovas. This is not at all caused by the explanation given above, but is instead the explosion of a white dwarf (the remnant of stars under the 8+ mass limit).
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