One year is correct...but how long is a year? 365 days or 366 or 365.25? Mostly we work on 365 days in a year but then every fourth year there are 366...because the Earth takes about 365.25 days to orbit the Sun. We all know that you divide the last two digits of the year by 4 and if they are a multiple of 4, then it's a leap year eg 2012, 2008, 2004 etc
Even then it's not quite 365.25 so when the year ends in 00, you divide the first two digits by 4 and if they are a multiple of 4, it is a leap year eg 1200, 1600, 2000 but NOT 1900, 1800, 1700.
So the question is not quite so simple as it first sounds.
AnswerOne yearThe Earth does not have a synodic period.
Synodic period is a measure of the time a planet returns to the same place in its orbit relative to the Earth.
The synodic period is the period between oppositions for an outer planet, or between inferior conjunctions for an inner planet.
Another viewpoint: Yes, the question seems wrong. It's possible it meant the
synodic period of rotation. That's the "solar day". The solar day for Earth is exactly 24 hours. Strictly speaking that's an average value called the
mean solar day.
The Sun's galactic period or period of revolution around the center of the Milky Way galaxy is esimated at about 225 to 250 million Earth years.
About 25 days near the Sun's equator, gradually increasing to
about 31 days at increasing north and south latitudes.
The earth makes one complete revolution around the sun every 365 and 1/4 days equalling one year.
365 days = 1 year = One revolution around the sun.
Approximately 365.2422 days
One year. More specifically, 365.24 days.
365.24 days
It is the average time of the revolution of the moon around the earth with respect to a line joining the sun and the earth. It is the period the moon takes to pass through all its phases.
Mars has roughly twice the Earth's period of revolution.
29.530588 days.
If you are talking about bodies in the solar system, then revolution almost always refers to the orbiting motion of a body around another body. This is the motion that gives us the year on earth. The earth revolves around the sun once in about 365.25 days. Revolution can be a little more complex than this. A sidereal revolution is the orbit of a body as it is observed from the distant stars. Synodic revolution is a revolution as it is observed from the body being orbited, and it brings the orbiting body back to its starting point relative to the sun. These two orbital periods are not the same length. The phases of the moon follow the synodic period; the synodic period is longer than the sidereal period by roughly a day or two.
Earth rotates once every 24 hours. If you divide 8766.15 by 24, you get pretty close to the number of days in a year. __________ Not quite. 24 hours is the average synodic period of earth, not the rotational (sidereal) period. Earth rotates once every 23 hours, 56 minutes and 4.1 seconds roughly. This turns out to be about 23.93 hours. The orbital period of earth is 8766.152784 hours roughly. So the earth rotates (sidereal) about 366.325 times in a year. See discussion if you doubt this result.
686.980 earth days, sidereal period; 779.94 earth days, synodic period.
The synodic period of the moon is 29.5 days.
It is the average time of the revolution of the moon around the earth with respect to a line joining the sun and the earth. It is the period the moon takes to pass through all its phases.
Mars has roughly twice the Earth's period of revolution.
29.530588 days.
If you are talking about bodies in the solar system, then revolution almost always refers to the orbiting motion of a body around another body. This is the motion that gives us the year on earth. The earth revolves around the sun once in about 365.25 days. Revolution can be a little more complex than this. A sidereal revolution is the orbit of a body as it is observed from the distant stars. Synodic revolution is a revolution as it is observed from the body being orbited, and it brings the orbiting body back to its starting point relative to the sun. These two orbital periods are not the same length. The phases of the moon follow the synodic period; the synodic period is longer than the sidereal period by roughly a day or two.
Jupiter has a period revolution (or orbital period) of 4331 Earth days.
Venus' period of rotation is 243 Earth days. Its period of revolution is 224. 7 Earth days. The revolution period is the length of a year in Earth days on Venus. This planet is a terrestrial planet.
Mars, because it takes the longest to get from opposition to opposition, when accounting for Earth's path around the Sun/
Earth rotates once every 24 hours. If you divide 8766.15 by 24, you get pretty close to the number of days in a year. __________ Not quite. 24 hours is the average synodic period of earth, not the rotational (sidereal) period. Earth rotates once every 23 hours, 56 minutes and 4.1 seconds roughly. This turns out to be about 23.93 hours. The orbital period of earth is 8766.152784 hours roughly. So the earth rotates (sidereal) about 366.325 times in a year. See discussion if you doubt this result.
You have to watch it and record its position every night until it has travelled right round the ecliptic until it gets back to where you first saw it. The time taken is called the synodic period. Then you have to allow for the fact that the Earth has been going round at the same time. That gives the true orbital period.
Earth