Slide 1Slide 2Slide 3Slide 4Using Your Sky SoftwareFound at the Sky Maps link at the PHY250 websiteSome useful informationDayton, OH is at about 40o North Latitude and 84o West LongitudeRemember, the brighter the object is, the SMALLER the magnitudeThe eye can detect objects to around magnitude 6The map can be “cleaned up” manipulating the magnitudes that are displayed and the toggle the names of objects off or on YourSkySoftware.pptUniversal Time (UT) Formerly known as Greenwich Mean Time The times of various events, particularly astronomical and weather phenomena, are often given in "Universal Time" (abbreviated UT) which is sometimes referred to, now colloquially, as "Greenwich Mean Time" (abbreviated GMT). The two terms are often used loosely to refer to time kept on the Greenwich meridian (longitude zero), five hours ahead of Eastern Standard Time. Times given in UT are almost always given in terms of a 24-hour clock. Thus, 14:42 (often written simply 1442) is 2:42 p.m., and 21:17 (2117) is 9:17 p.m.Prime Meridian 1 2 3 4 5 6 7 8 9 101112 1 2 3 4 5 6 7 8 9 10 11 12Dayton is 5 hours behind UTUsing Your Sky SoftwareIf you wish to change the time of day in the sky map to match the time you will be going out to make your observations, you must change the time using the Universal Time
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