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 synodic period of the Moon is about 29.5 days, representing the time it takes to go through a complete cycle of phases as observed from Earth. This period defines the time between successive occurrences of the same phase, such as from full moon to full moon. The slightly longer synodic period compared to the Moon's orbital period is due to Earth's motion around the Sun.
Mars has roughly twice the Earth's period of revolution.
A synodic month is the time it takes for the Moon to return to the same phase, such as from full moon to full moon. This period is approximately 29.5 days long. It differs from the sidereal month, which is the time it takes for the Moon to complete one orbit around the Earth.
The orbital period is the time it takes for an object to complete one orbit around another object, like a planet around a star. The synodic period is the time it takes for a given object to return to the same position in the sky relative to the Sun as seen from Earth, for example the time between two consecutive similar configurations of a planet as observed from Earth.
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.
686.980 earth days, sidereal period; 779.94 earth days, synodic period.
The synodic period of the moon is 29.5 days.
The synodic period of the Moon is about 29.5 days, representing the time it takes to go through a complete cycle of phases as observed from Earth. This period defines the time between successive occurrences of the same phase, such as from full moon to full moon. The slightly longer synodic period compared to the Moon's orbital period is due to Earth's motion around the Sun.
Synodic rotation refers to the time it takes for a celestial body to complete a full rotation relative to the Sun as seen from Earth. It is often longer than the body's actual rotation period due to the Earth's orbital motion. For example, the synodic rotation of Mercury is about 176 Earth days, while its actual rotation period is around 59 Earth days.
Mars has roughly twice the Earth's period of revolution.
A synodic month is the time it takes for the Moon to return to the same phase, such as from full moon to full moon. This period is approximately 29.5 days long. It differs from the sidereal month, which is the time it takes for the Moon to complete one orbit around the Earth.
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.
The orbital period is the time it takes for an object to complete one orbit around another object, like a planet around a star. The synodic period is the time it takes for a given object to return to the same position in the sky relative to the Sun as seen from Earth, for example the time between two consecutive similar configurations of a planet as observed from Earth.
Earth
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.
From the point of view of a person on earth, the moon's period of rotation on its axis and revolution around earth are both 27.32 days. From the point of view of a person on the moon, the period of rotation on its axis and revolution around earth are both 27.32 [earth] days, and the period of revolution around the sun averages 365.24 earth days.
From the point of view of a person on earth, the moon's period of rotation on its axis and revolution around earth are both 27.32 days. From the point of view of a person on the moon, the period of rotation on its axis and revolution around earth are both 27.32 [earth] days, and the period of revolution around the sun averages 365.24 earth days.