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	Search Results for Timekeeping and Calendars Search Type: Keywords | Results: Radio Programs | Images | FAQs | Other Resources | Search Again Definition No definition found for Timekeeping and Calendars Stargazing Tip No stargazing tips found. Check the Sky Almanac for more information. Radio Programs Displaying 1 to 5 (of 37 total) results | More results »  Title  Air Date November November 1, 2009 Autumnal Equinox September 21, 2009 Changing Seasons August 29, 2009 Lammas August 1, 2009 April April 1, 2009 Note: Audio versions of our programs will be available the day after they air. Visit the transcript page to listen. Image Gallery No results found for Timekeeping and Calendars (keywords). Frequently Asked Questions Displaying 1 to 1 (of 1 total) results  Question Who built the first observatory? Other Resources
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