Solar time - Wikipedia, the free encyclopedia
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Solar times are measures of the apparent position of the Sun on the celestial sphere. They are not actually the physical time, but rather hour angles, that is, angles expressed in time units. They ar...
en.wikipedia.org/wiki/Solar_time
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Sidereal time - Wikipedia, the free encyclopedia
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Astronomers use sidereal time as a way to keep track of the direction in which their telescopes need to be pointed to view any given star in the night sky. Just as the Sun and Moon appear to rise in...
en.wikipedia.org/wiki/Sidereal_time
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The sidereal day is defined to be the length of time for the vernal equinox to return to your celestial meridian. The solar day is defined to be the length of time for the Sun to return to your celestial meridian.
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csep10.phys.utk.edu/astr161/lect/time/timekeeping.html
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There are actually two ways of measuring a day. The normal one we use it the solar day, the period between one time and that the sun is at a certain point in the sky, which lasts 24 hours. Astronmers prefer to use the sidereal day, the leng...
http://answers.yahoo.com/question/index?qid=20070710201...
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The Mean Solar Day ... Learning the difference between the Apparent Solar Day and Mean Solar Day ... The apparent solar day may only gain or loose as much as 20 seconds per day, but the difference adds up because the effects are cumulative. For instance, if the apparent solar day is longer than the mean solar day today,
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www.nfo.edu/solarday.htm
www.nfo.edu/solarday.htm
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WorldFest is a solar-powered celebration of music, the environment, animals and humanity. We’re helping people learn what they can do for the Earth and its inhabitants. The WorldFest 2009 Earth Day Festival will be held at the beautiful outdoor setting of Woodley Park in Encino, CA.
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The times are shown in hours. How long are one solar day and one sidereal day for this planet? Which is longer? Why? ... The gray line runs from the center of the planet to the center of its Sun, and thus passes through the observer's point at exactly solar noon each day. For this observer, what is the length of one solar day?
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physics.gac.edu/physlets/Chaisson/Prologue/ChaissonP_1....
physics.gac.edu/physlets/Chaisson/Prologue/ChaissonP_1.html
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Different kinds of days and their lengths. ... In 1991, one mean solar day = 1.00273790935 mean sidereal days. The mean sidereal day is 23 hours, 56 minutes, 4.09054 seconds long, about 3 minutes 55 seconds shorter than the mean solar day. In other words, the stars rise about four minutes earlier each day.
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www.sizes.com/time/day.htm
www.sizes.com/time/day.htm
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Mars rotates once every 24.623 hours (its sidereal day) and it orbits the Sun once every 686.98 solar earth days. Show how to find out how long a solar day is on Mars.
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www.astronomynotes.com/nakedeye/s7.htm
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