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What's the difference between a sidereal year and a synodic year?
A sidereal year is the time it takes for Earth to complete one orbit around the sun relative to the fixed stars, about 20 minutes longer than a tropical year. A synodic year is the time between successive oppositions or conjunctions of a planet, like from one opposition of Mars to the next, which is about 22 days longer than a sidereal year.
What are the two kinds of months that astronomers speak of?
Astronomers speak of two kinds of months: the sidereal month and the synodic month. The sidereal month is the time it takes for the Moon to complete one orbit around Earth with respect to the stars, while the synodic month is the time it takes for the Moon to complete a full cycle of phases, such as from full moon to full moon.
What is the relationship between the sidereal and synodic periods in celestial mechanics?
The sidereal period is the time it takes for a celestial body to complete one orbit relative to the fixed stars, while the synodic period is the time it takes for a celestial body to return to the same position relative to the Sun as seen from Earth. The relationship between the two periods is influenced by the relative motion of the Earth and the celestial body, and can vary depending on their orbits and positions.
What is a sidereal month and why is it dfferent than a synodic month?
Synodic month is longer than Sidereal month because when the moon completes 1 revolution round the earth, it will not be a full moon as the earth also moves in its orbit
How long does it taks earth to rotate?
One Day, or 24 hours. Twenty four hours is the rough and commonly understood period of rotation, since we know that a day of universal time is exactly 24 hours in length. But to be more precise, a sidereal rotation of the earth (exactly 360 degrees as observed from the distant stars) takes 23 hours, 56 minutes and about 4.1 seconds. To understand how this can be so, research the difference between sidereal and synodic periods of rotation.
Why is the lunar month longer than the number of days it takes to orbit the earth?
Because the Moon orbits the Earth whereas the Sun and stars do not. So the Moon has real motion apart from what the rotation of the Earth appears to give it. Thus the Moon rises in the East about 20 minutes sooner every day.
How many months have more than 4 Tuesdays?
5 months
How many years does it take to make a hotel?
Many. It takes months to get the bills and everything taken care of, more months to build it, and even MORE months to get the furniture in, and so on.............
How many days exactly in a year?
365.25 days. If you want a more exact answer you have to specify whether you mean the vernal equinox year, the sidereal year or the tropical year.
How many months are in B months?
It rather depends on what is meant by B months - more info is required!
About how long does it take the moon to rotate on its axis?
The moon takes 29.5 days to complete one synodic cycle. This cycle is what we observe from earth, and it is the cycle we would measure from, say, one full moon to the next. However, by the time a synodic cycle ends, the moon has rotated a little more than 360 degrees. This is hard to grasp and takes some time and thought. The rotation of bodies that are orbiting other bodies always presents a need to distinguish between synodic and sidereal rotation. The true, 360 degree sidereal rotation of the moon takes 27.32 earth days. See links on the moon, and on synodic and sidereal periods. Note: Many erroneously conclude that since the same face of the moon always orients toward earth this means that the moon cannot be rotating. However, if you imagine observing from the north the orbiting of the moon around the earth (the moon does orbit the earth-- another idea that some people don't believe), the only way that the same face orients toward earth is for the moon's orbital and rotational periods to be the same. The moon is tidally locked with earth, and this is what causes the orbital and rotational periods to be the same. The face of the moon does in fact change a little due to the phenomenon called libration, a topic beyond the scope of the question. == ==Jeremiah Deem Tulsa - 27.322 days
What is the sidereal period?
The sidereal period is the time it takes for a celestial body to complete one orbit around another body with respect to the fixed stars. It is different from the synodic period, which is the time between successive similar configurations as seen from Earth.
