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Tropical/Sidereal Chart
Tropical/Sidereal Chart

... behind their actual Tropical placement when we convert the chart to a Fixed star or Sidereal Vedic chart. This means that some or all of the planets in a Tropical chart will move backwards from one sign/house to another, if we want to convert the Tropical placement of planets to the actual placement ...
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... How do we “see” that the earth is moving around the sun or v.v.? • Small discrepancy between sun’s motion and motion of stars • Sidereal vs solar day • At noon, say, the sun is not exactly in front of the same stars on the next day. – It is exactly in the south – The stars are faster, so a little w ...
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Week 3 - Emerson Valley School
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Solstice - East Hanover Township School District

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Earth ,Moon,and Sun - Laconia School District

... In addition to the earth rotating on its axis it also travels around the sun. This is called revolution. It is the movement of one object around another. One complete rotation around the sun is a year. Earth travels on its orbit or its path that leads it around the sun. Earth’s orbit is not quite a ...
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... gravitational pull of the Sun and Moon on the Earth’s equatorial bulge. (The other planets contribute slightly.) This causes the vernal equinox to move slowly westward along the ecliptic by about 50.3 arc seconds per year. (An arc second is 1/3600 of a degree.) The precessional period is about 26,80 ...
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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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