Science Buddies: "Ask an Expert"

Today, in our city Shimoga - (Karnataka, India), We observed a ring like structure around sun (which was in the colour of rainbow) - which we later came to know called as CIRCULAR HALO and we were also informed that it was due to the small ice crystals in the clouds acting as the prism..

My question is that, when we see a rainbow - we see it in a particular direction from the sun, but why this (circular halo) can be seen around the sun ?? And why can't we see a normal rainbow like that ?

Hi,

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A. Norman