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navaneeth_unnikrishnan navaneeth_unnikrishnan

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Navaneeth Unnikrishnan 🏔 | 📸  📷 Photographer - Sigma India Ambassador, Works featured in Nat Geo, BBC Earth, Space.com, Huffpost | Contributor for BBC Earth🌍 | Traveller | Kerala

Intense Airglow looking like an Aurora. Shot from Lanza, Spiti Valley, India  The airglow is the light of electronically or vibration-rotationally excited atoms of molecules 80 km or higher. Aurorae are at similar heights and are also the light of excited atoms. There is a difference, however, auroral excitation is by collisions with energetic particles whereas daytime short wavelength solar radiation produces the airglow via chemical excitation of which electronically excited oxygen atoms are the main component. © @navaneeth_unnikrishnan

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