Doomsday prophesies have never once come to pass, but they've never had science on their side like this before.
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But there's much more than just the Sun and the planets. There are asteroids, which primarily orbit between Mars and Jupiter. There are Kuiper belt objects, which orbit in an extended disk beyond Neptune. There are centaurs, which orbit between asteroids and Kuiper belt objects: the hybrids of our Solar System. And there's the Oort cloud, extending out for a light-year or more beyond the Kuiper belt. All totaled, there are likely more than a million objects populating these regions.
On the other hand, the main object itself will have small chunks break off of it as it heats up, with some fragments orbiting ahead of the main body and others orbiting behind it. Over the course of many such orbits, these tiny bits that have been expelled from the parent body will grow populate the entire orbital path that the comet-like object follows.
the object that created the debris, Comet Swift-Tuttle, is massive and enormous, at 26 kilometers across, Astronomical and geophysical observatory, Comenius University ; NASA , via Wikimedia Commons user Svdmolen If it struck the Earth, it would release more than one billion MegaTons of energy: the equivalent of approximately 20 million hydrogen bombs exploding all at once. According to Gerrit Verschuur, who, the comet that gives rise to the Perseids is, without a doubt, the single most dangerous object known to humanity.
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