1. Name of twilight when the sun is 12º below the horizon

Ans: Nautical

  1. Thing that appears at astronomical dusk and disappears at astronomical dawn

Ans: Faintest star visible to the naked eye

  1. Asura who could only be slain at twilight

Ans: Hiranyakashipu

  1. Pink border visible above the earth’s shadow at twilight

Ans: Belt of Venus

  1. Ozone’s absorption that gives the sky a deep blue shade

Ans: Chappuis effect

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