dreamworld Posted March 18, 2004 Report Share Posted March 18, 2004 And I mean PRECISELY !!!! I know the calculation 60 * 60 * 24 * 365.25 but I was looking for a scientifically accurate answer as to exactly how many seconds it takes the earth to make one orbit of the sun, and not something filtered through an inacurate time calander. Any answers gratefully received ...... Link to comment Share on other sites More sharing options...
deamonstar Posted March 18, 2004 Report Share Posted March 18, 2004 well first you must decide what type of year you are baseing your calculations on. is it a sidereal year or a solar year?for some more info on this follow these links: types of years time-keeping in astronomy Link to comment Share on other sites More sharing options...
dreamworld Posted March 20, 2004 Author Report Share Posted March 20, 2004 Thanks for the links ! I guess I was thinking of a solar year but both would be of interest to me. Link to comment Share on other sites More sharing options...
dreamworld Posted March 29, 2004 Author Report Share Posted March 29, 2004 come on -somebody must know..... Link to comment Share on other sites More sharing options...
jughead Posted March 30, 2004 Report Share Posted March 30, 2004 Definition of a year: vernal equinox to vernal equinox (apparent)also astronomical year natural year equinoctial year solar year tropical year 365 days, 5 hours, 48 minutes, 46 seconds fixed star to same position (apparent)also sidereal year 365 days, 6 hours, 9 minutes, 9 seconds Sources you might be able to verify:Hewlett-Packard 28S calculator: 31556925.9747 seconds/yearGoogle calculator: 31556926 seconds/year Trivia:Because of the difference in time between a sidereal and a solar year, nobody that is alive today was really born under the zodiac sign that they are given. For example, Aries isn’t behind the Sun between March 21st and April 21st. Link to comment Share on other sites More sharing options...
dreamworld Posted March 30, 2004 Author Report Share Posted March 30, 2004 Originally posted by: jugheadDefinition of a year: vernal equinox to vernal equinox (apparent) also astronomical year natural year equinoctial year solar year tropical year 365 days, 5 hours, 48 minutes, 46 seconds You are a star !!!! (excuse the pun) Just to clarify - the above is the exact time for all 5 of those years ? Link to comment Share on other sites More sharing options...
jughead Posted March 31, 2004 Report Share Posted March 31, 2004 It is the correct value to the nearest second. It's not exact. There is precision involved. Here is a link so that you can verify the time interval:Columbia Encyclopedia: tropical year Here is a link that shows four of the five names that I gave as being the same thing (the other one also refers to the same thing):Definition of a year Here is the most precise value for a solar year that I know of: 31,556,925.97474 seconds.Add 1223 seconds for a sidereal year. Link to comment Share on other sites More sharing options...
dreamworld Posted April 26, 2004 Author Report Share Posted April 26, 2004 Again - thanks for the links. If I wanted to work out how long it took the exact centre of the earth to do one complete an orbit, would taking an average of the sideral and solar years accomplish this ? Also , and this may seem like a bit of a quack question, is there a mathematical relationship between the time it takes the earth to orbit the sun and the time it takes other planets to orbit the sun ? Also theoretically would it be possible to invent a more accurate calender based on what we know now ? Perhaps the values and quantities of seconds minutes and hours could also be reassesed ? Just some vague musings. Link to comment Share on other sites More sharing options...
webdrafter Posted May 16, 2004 Report Share Posted May 16, 2004 there are 12 seconds in a year: January 2nd, February 2nd, March 2nd, April 2nd, May 2nd, June 2nd, July 2nd, August 2nd, September 2nd, October 2nd, November 2nd and December 2nd. Link to comment Share on other sites More sharing options...
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