TNPSC Thervupettagam

Astronomical Grand Cycles

March 17 , 2024 253 days 436 0
  • The Earth undergoes climate fluctuations in a newly discovered 2.4-million-year cycle.
  • Geological sedimentary evidence in the deep sea has proved the existence of the cycle, which is linked with Mars’ orbit.
  • We are now about 200,000 years into a warming cycle.
  • In about 1 million years, we’ll reach the next peak.
  • The gravity fields of the planets in the solar system, interfere with each other and this interaction, called a resonance.
  • It changes planetary eccentricity, which measures how close to circular their orbits are.
  • This interaction leads to periods of higher incoming solar radiation and warmer climates in cycles of 2.4 million years on Earth.

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