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Source: The post is based on the article “Auroras: Ladakh observatories spot red aurora” published in “Indian Express” on 11th November 2023
Why in the News?
The Hanle and Merak observatories in Ladakh have captured images of an intense red aurora.
What are Auroras?
| Specifications | Details |
| Definition | Auroras are patterns of bright lights in the sky. They are seen when particles ejected by the Sun interact with the magnetic field around the Earth. The phenomenon is usually visible closer to the poles. |
| Types | Aurora Borealis (Northern Lights): Occurs in the Northern Hemisphere. – Note: In Finland, the aurora borealis is called revontulet which literally translates to fox fires. Aurora Australis (Southern Lights): Occurs in the Southern Hemisphere. |
| Colours | The colours of auroras are produced by the type of gas molecules in the Earth’s atmosphere that the charged particles interact with. Common colours include green, pink, purple and red. |
| Do other planets get auroras? | Auroras are not just something that happens on Earth. If a planet has an atmosphere and magnetic field, they probably have auroras. |
| Geomagnetic Storms Influence | Geomagnetic storms, triggered by solar events like coronal mass ejections (CMEs) and solar flares, enhance auroral activity. |
| Cultural Significance | Auroras hold cultural and spiritual significance in many indigenous cultures. They are often associated with myths, legends and spiritual beliefs. |
| Scientific Study | Scientists study auroras to gain insights into the Earth’s magnetosphere, the solar-terrestrial relationship, and the behaviour of charged particles in the atmosphere. They also use them as indicators of solar activity. |
UPSC Syllabus: Science and Technology
