it takes the earth 365.256 days to orbit the sun.
it takes the earth 365.256 days to orbit the sun.
how many days does it take the earth to orbit the sun?
365.256 days
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the two stereo spacecraft were launched at 00:52 utc on october 26, 2006, from launch pad 17b at the cape canaveral air force station in florida on a delta ii 7925-10l launcher into highly elliptical geocentric orbits. the apogee reached the moon's orbit. on december 15, 2006, on the fifth orbit, the pair swung by the moon for a gravity assist. because the two spacecraft were in slightly different orbits, the "ahead" (a) spacecraft was ejected to a heliocentric orbit inside earth's orbit while the "behind" (b) spacecraft remained temporarily in a high earth orbit. the b spacecraft encountered the moon again on the same orbital revolution on january 21, 2007, being ejected from earth orbit in the opposite direction from spacecraft a. spacecraft b entered a heliocentric orbit outside the earth's orbit. spacecraft a will take 347 days to complete one revolution of the sun and spacecraft b will take 387 days. the a spacecraft/sun/earth angle will increase at 21.650 degree/year. the b spacecraft/sun/earth angle will change −21.999 degrees per year. given that the length of earth's orbit is around 940 million kilometres, both craft have an average speed, in a rotating geocentric frame of reference in which the sun is always in the same direction, of about 1.8 km/s, but the speed varies considerably depending on how close they are to their respective aphelion or perihelion (as well as on the position of earth). their current locations are shown here.
stereo