Comet A1 Leonard near Earth - a moment to study

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Comet A1 Leonard is arriving - an update

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Comet A1 Leonard near Earth - a moment to study

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  • The story: Comets are cosmic snowballs of frozen gases, rock, and dust that orbit the Sun. When frozen, they are quite small, but when a comet's orbit brings it close to the Sun, it heats up and throws dust and gases into a giant glowing head larger than most planets. Comets are sometimes called dirty snowballs or "icy mudballs". They are a mixture of ices (both water and frozen gases) and dust that for some reason didn't get incorporated into planets when the solar system was formed. There are many comets in the solar system.
  • Comet A1 Leonard: This is a long period comet, discovered by GJ Leonard in January 2021. It will pass near the earth on December 18, 2021, and reached naked eye visibility in December 2021. It is to make its closest approach to the sun in January 2022.
  • Long period comets: The long period comets have eccentric orbits, and their periods range is greater than 200 years (usually from thousands to even millions of years). But the short period comets are those whose orbital period is less than 200 years. Their orbits take them beyond the outer planets (Jupiter and the rest). The short period comets are believed to have originated from Centaurs.
  • A1 Leonard's retrograde orbit: A "Retrograde orbit" is the rotational motion of the astronomical object in the direction opposite to the rotation of the primary. On the other hand, prograde orbit is the motion of the object in the same direction as that of its primary. Assume, sun is rotating west to east. If the earth is revolving west to east, then the earth’s orbit is called prograde. If the earth is revolving east to west then the orbit is called retrograde.
  • EXAM QUESTIONS: (1) Explain the differences between coments, asteroids, meteoroids, meteors and meteorites. (2) What is the Haley's comet? What impact did it have on earth and its various kingdoms? Explain.
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                    PT's IAS Academy: Comet A1 Leonard near Earth - a moment to study
                    Comet A1 Leonard near Earth - a moment to study
                    Comet A1 Leonard is arriving - an update
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