Book (Practical) Astronomy and space science Why Comets Have Long Tails in the Night Sky / Junichi Watanabe

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Astronomy and Space Science
In the autumn of 2024, it is predicted that the "Purple Mountain, Nanjing Atlas comet" will approach the Sun and become as bright as Mimas 5 be visible with the naked eye. This comet is expected to be as bright as Venus, which shines brightly and dazzling in the evening and dawn sky. It is predicted to be the brightest comet that can be seen with the naked eye in 10 years. Many people imagine a comet pulling its tail in the night sky, but it was called a "broom star" in the old days. It is familiar as an astronomical object, but few people have actually seen a comet, or know the mechanism by which a comet pulls its tail, or where it comes from in the universe. In this book, Mr. Junichi Watanabe of the National Astronomical Observatory gives a detailed explanation of scientific mechanisms such as the origin of comets, their orbits, and the mechanism by which their tails extend and how they appear, referring to historical large comets such as the Purple Mountain, Nanjing Atlas comet, Halley's Comet, Hale-Bopp Comet, and MacNote Comet.