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Young Astronomers Digest
Young Astronomers Digest

... you are), this month’s issue is on the Myths and Urban Legends of Astronomy. For the younger minds, we’ve laid out myths like the phases and the spinning of the moon (yes it does spin!) as well as why stars actually don’t come in only the colour white and why Polaris may not be as bright as you thin ...
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... planet from the Sun after Mercury and Venus. These planets, as well as the other planets, orbit around the Sun. The American Heritage Dictionary defines orbit as “The path of a celestial body or an artificial satellite as it revolves around another body.” Our year corresponds to one journey or one o ...
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... The ‘quiet Sun’ from chromosphere to 1 MK corona has been very constant over the last 12 years (and more). Further work:  Relate EUV radiances to their magnetic fields.  Improve predictions of EUV radiances (current models use proxies: does not work!) Climate models: predict the EUV irradiance bac ...
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Rock of Eternity: The Megalith of Pallikonda
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... sandy-loamy soil. The distribution pattern of these sites also coincides with high rainfall zones where the average annual precipitation is 60–150 cm. Both the factors point to a common conclusion that megalith builders knew farming and were constructing the megaliths near their farming lands. In th ...
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satan`s magickal squares

... use these has been destroyed and corrupted. Given several different sources, each presented a lame explanation of these powerful squares on how to correctly use them. Western occultism corrupted by Jewish filth instructs taking the numbers and converting them [according to the Hebrew version of nume ...
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Tropical year

A tropical year (also known as a solar year), for general purposes, is the time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronized with the position of the Earth in its orbit around the Sun. As a consequence, the tropical year is about 20 minutes shorter than the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars (the sidereal year).Since antiquity, astronomers have progressively refined the definition of the tropical year. The Astronomical Almanac Online Glossary 2015 states:year, tropical:the period of time for the ecliptic longitude of the Sun to increase 360 degrees. Since the Sun's ecliptic longitude is measured with respect to the equinox, the tropical year comprises a complete cycle of seasons, and its length is approximated in the long term by the civil (Gregorian) calendar. The mean tropical year is approximately 365 days, 5 hours, 48 minutes, 45 seconds.An equivalent, more descriptive, definition is ""The natural basis for computing passing tropical years is the mean longitude of the Sun reckoned from the precessionally moving equinox (the dynamical equinox or equinox of date). Whenever the longitude reaches a multiple of 360 degrees the mean Sun crosses the vernal equinox and a new tropical year begins"". (Borkowski 1991, p. 122)The mean tropical year on January 1, 2000, was about 365.2421897 ephemeris days according to the calculation of Laskar (1986); each ephemeris day lasting 86,400 SI seconds. By 2010 this had decreased to 365.2421891 (365 ephemeris days, 5 hours, 48 minutes and 45.14 seconds). This is about 365.242181 mean solar days, though the length of a mean solar day is constantly changing.
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