Disclaimer
Estimates, not guarantees
Every calculator on Look Up Nights produces an estimate from the numbers you enter and the formula shown on its page. Real results depend on measurement accuracy, product strength and conditions we cannot see. Always follow the product label or official rules where they differ from our estimate.
Eye safety
Never look at the Sun without proper solar eye protection, except during the brief total phase of a total solar eclipse. Regular sunglasses are not safe. Never look at the Sun through binoculars, a telescope or a camera without a proper solar filter fitted to the front. Follow NASA's eclipse safety guidance. Our pages are for planning; weather, terrain and local conditions affect what you can see.
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