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NWS Home > Climate > NWS Portland > Astronomical

This page provides data on sunset/sunrise, moon phases, tides and currents, and official time.

Observed Weather Climate Locations Climate Prediction Climate Resources Local Data/Records Astronomical NOWData
Astronomical Data

Sun and Moon
Tides and Currents
Time

The U.S. Naval Observatory (USNO) computes astronomical data. Therefore, the NWS does not record, certify, or authenticate astronomical data. Computed times of sunrise, sunset, moonrise, moonset; and twilight, moon phases and other astronomical data are available from USNO's Astronomical Applications Department (http://www.usno.navy.mil). See http://www.usno.navy.mil/USNO/astronomical-applications/astronomical-information-center/litigation for information on using these data for legal purposes.

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Page last modified: 21-Jul-2006 2:37 AM
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