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Consider the following statements with reference to Eta Aquariid meteor shower:
1. It forms when Earth passes through the orbital plane of the Halley’s Comet.
2. It appears for the same number of times in both Northern and Southern hemispheres of the Earth.
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    2 only
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements with reference to Eta Aquariid meteo...
The Eta Aquariid meteor shower, which has been active since April 15, will peak on May 5 and 6.
  • The Eta Aquariid meteor shower is formed when Earth passes through the orbital plane of the famous Halley’s Comet, which takes about 76 years to orbit the Sun once.
  • This shower seems to be originating from the Aquarius constellation — hence ‘Eta Aquariid’.
  • It is known for its rapid speed. This makes for long, glowing tails which can last up to several minutes.
  • About 30 to 40 Eta Aquarid meteors can be seen per hour during the peak of the meteor shower, if observed from the Southern Hemisphere.
  • The number decreases to about 10 meteors per hour if being viewed in the Northern Hemisphere. This is due to the location of the “radiant” — the position in the sky where the meteor shower seems to come from.
  • In the Northern Hemisphere, Eta Aquarid meteors most often appear as ‘Earthgrazers’ — long meteors which appear to skim the surface of the Earth. In the South, however, they can be seen higher up in the sky, and hence are more visible.
What are comets?
  • These are frozen leftovers from the formation of our solar system, some 4.6 billion years ago.
  • Comets are composed of dust, rock and ice, and orbit around the Sun in highly elliptical orbits which can, in some cases, take hundreds of thousands of years to complete.
  • Billions of them theorised to be orbiting the Sun beyond Neptune, in the Kuiper Belt and even more distant Oort cloud.
  • As they come closer to the Sun, comets “heat up and spew gases and dust into a glowing head that can be larger than a planet”. This material also forms a tail which stretches millions of miles.
Hence only statement 1 is correct.
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Consider the following statements with reference to Eta Aquariid meteor shower:1. It forms when Earth passes through the orbital plane of the Halley’s Comet.2. It appears for the same number of times in both Northern and Southern hemispheres of the Earth.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?
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