Astronomy Tools

Browse all available astronomy tools.

Available tools

Light Travel Time Calculator Compute how long light takes to cover a distance in a vacuum, in seconds and days.
Parsec to Light Year Converter Convert a distance in parsecs to light years.
Sunrise, Sunset, and Daylight Calculator Estimate local apparent sunrise, sunset, solar noon, and theoretical daylight from the NOAA solar equations. The sunshine duration is the astronomical maximum, not observed cloud-adjusted sunshine.

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