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Name: Amanda Smith
Status: N/A
Age: 13
Location: N/A
Country: N/A
Date: 1993 - 1999

What is an Aurora Borealis made of and why does it appear only sometimes

Aurora Borealis is made of charged particles moving in Earth's magnetic field. These particles emit light as they interact with the ionosphere. These particles are emitted by Sun in small quantities ( as compared to Sun's mass ) and whenever these cross Earth, we see the display. Solar activity has an 11 yea r period so the Auroral activity also varies over this period.

Jasjeet ( Jasjeet S Bagla )

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