03 Nov Coronal Holes
Posted at 03 Nov 2022 in Current Affairs, GS Paper III 0 Comments
Details on the topic “Coronal Holes”
Relevance for Prelims: Space Technology, Cosmic findings.
Relevance for Mains: Significance of It, Maunder Minimum
Context: Recently, NASA has captured an image that shows dark patches on the surface of the sun resembling a smile and the sun.
Pic: Coronal Holes
- They gush out solar winds into space.
- They are comparatively colder and appear darker than their surrounding as soar material is less.
- Coronal Holes last between a few weeks to months.
- Solar Minimum, is a period of time when the Sun’s activity is substantially diminished.
- Their number waxes and wanes in cycles that last 11 years approximately
- They help in understanding the environment of space.
- Contrary to this, sunspot activity may be correlated with the climate on earth. In the period between 1645 and 1715, sunspot activity had come to a halt on the Sun – a phenomenon referred to as the Maunder minimum.
- This coincided with extremely cold weather globally. So, sunspots may have relevance to the climate on earth.
- Such links are tenuous, but solar activity affects space weather, which can have an impact on space-based satellites, GPS, power grids, and so on.
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Source: Indian Express