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Sunspots
March 11 , 2020
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- The sunspots identified by researchers from IISER Kolkata herald the start of a new solar cycle.
- There are signs that cycle 25 has just begun.
- Sun spots are relatively cooler spots on the Sun’s surface.
- Their number waxes and wanes in cycles that last 11 years approximately.
- Sunspots occur in pairs, with a leader and a follower.
- They originate deep within the Sun and become visible when they pop out.
- Their number is not constant but shows a minimum and then rises up to a maximum and then falls again in what is called the solar cycle.
- So far, astronomers have documented 24 such cycles, the last one ended in 2019.
- From our safe distance of about 148 million km, the Sun appears to be sedate and constant.
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