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Gemini North’s laser shines through airglow

Gemini North’s laser shines through airglow

The Gemini North telescope’s laser guide star beams up into the atmosphere, backdropped by the mesmerizing green wash of airglow . The laser guide star is used to measure turbulence in the Earth’s atmosphere so the telescope can correct for it and achieve clear images of the night sky. Airglow is faint light emitted by atoms in the upper atmosphere that have been excited by the Sun’s ultraviolet radiation. Gemini…

Credit
NOIRLab/NSF/AURA
Telescope
Gemini North
Licence
CC BY 4.0 — credit required
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APOD · NASA — public domain ·

Let’s Go, Airglow!

NOIRLab/NSF/AURA ·