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TeachMeFinance.com - explain Astronomical Dawn Astronomical Dawn The term 'Astronomical Dawn' as it applies to the area of the weather can be defined as ' The time at which the sun is 18 degrees below the horizon in the morning. Astronomical dawn is that point in time at which the sun starts lightening the sky. Prior to this time during the morning, the sky is completely dark'. Previous 5 Terms: astrapophobia Astrocyte astrogeology astrology astrometeorology Next 5 Terms: Astronomical Dusk astronomical tide Astronomical Unit astronomical unit Astronomical Unit (AU) About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.