The afternoon began by donning some lightweight Revo Waterway sunglasses, which I desperately needed to protect my eyes from the relentless sun.

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However, comets are unpredictable and can break up or fizzle out altogether even on their approach to the Sun - so sky watchers will surely keep their eyes on Ison.

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Her cheeks were flushed and the sun was hitting her in the eyes, so she squinted to see him.

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Hidden in a hangar at the US Navy's Patuxent River Air Base, in Maryland, away from prying eyes and shaded from the intense sun, US and British ground crew made the final preparations before the plane took to the clear blue skies.

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