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Is the analemma is a useful tool for locations north of the Tropic of Capricorn?
Yes
Does the analemma determine how far a country is located from the equator?
If it is on a map or globe, then yes, it does.
Is a analemma useful only north of the tropic of Capricorn?
No, an analemma is not limited to only north of the Tropic of Capricorn. An analemma is a figure-eight shape that represents the Sun's position in the sky at the same time each day throughout a year. It can be observed anywhere on Earth, as long as there are daily changes in the Sun's position relative to the observer.
What is the thing that looks like a stretched out 8 on a globe called?
It is called the analemma. It describes the apparent change in position of the sun that results from the tilt in earth's axis, and the libration caused by earth's changing velocity in its orbit around the sun.
What if earth moved in a circular orbit farther from the sun?
It would be colder on Earth. the farther, the colder. Also solar time and civil time would match up perfectly or nearly so; there would be no need for a 'mean solar day', or 'mean time'. The analemma would be a straight line.
Shape of the analemma if the ecliptic-equator angle increases?
The analemma would stretch in the north-south dimension.
What is an analemma?
An analemma is an egg-shaped or figure-eight curve which results when the sun's position in the sky is plotted over the course of the year at the same hour of mean solar time every day.
Is the analemma is a useful tool for locations north of the Tropic of Capricorn?
Yes
Does the analemma determine how far a country is located from the equator?
If it is on a map or globe, then yes, it does.
Is a analemma useful only north of the tropic of Capricorn?
No, an analemma is not limited to only north of the Tropic of Capricorn. An analemma is a figure-eight shape that represents the Sun's position in the sky at the same time each day throughout a year. It can be observed anywhere on Earth, as long as there are daily changes in the Sun's position relative to the observer.
How do you make a Loop Sundial and use its equations?
I think the magic word here is Analemma and you'll find a wikipedia article of good quality.
How does the analemma relate to the motion of the sun along the ecliptic?
The Sun is always on the ecliptic, even though the analemma seems to suggest that the Sun is engaged in some kind of fancy wobble. The analemma has a "figure of eight" shape. There are two components that cause this shape. First, the Sun seems to move in the north-south direction in the sky during the year, because of Earth's tilted axis. The second component is explained below. This is about the Sun's apparent daily motion East to West across the sky: The analemma is also caused because civil time or Universal Time (UTC) does not line up perfectly with "apparent solar time". Apparent solar time is what a sundial measures. UTC is almost exactly the same as "mean solar time" (the original "Greenwich Mean Time"). Our clocks are based on UTC. UTC gives the average day length over the course of a year, independent of the exact position of the Sun in the sky. The difference between these two measurements of time is caused by the Earth's tilt (again) and the Earth's elliptical orbit. So the analemma captures the Sun sometimes earlier than, and sometimes later than, what would be the theoretical 'average' position of the Sun (sometimes called "Mean Sun") over the course of a year. The analemma doesn't actually 'exist' as a physical reality. For those who are not familiar with the term, this is how you would 'observe' the analemma. Set up a camera in such a way that it will capture an image of the Sun at, for example, exactly 12:00 noon, in your local timezone. Keep the camera firmly anchored and under enough protection so that it can remain where it is for an entire year. At regular weekly intervals photograph the Sun at exactly 12:00 noon. At the end of the year, the image will show the characteristic "8" shape of the analemma. The one thing you will have to do is assure that the initial camera's view is such that the Sun will always appear in the image at noontime, all year. If you start with the Sun exactly in the middle, there may be a season when the Sun at noon will not be in the camera's view. Also you need to allow for "daylight saving" changes to your local noon, of course.
What two things does the analemma show?
The solar analemma is an elongated figure of eight. There are three main parameters which define the shape - obliquity, eccentricity and the angle between the apse line and the line of solstice. The distance from the node, along the north-south lobes show the latitude [on Earth] at which the sun is overhead. This is a measure of the earth's axial tilt.The distance from the vertical axis - in the east-west direction - is a measure of the difference between the time as shown by the sun's position and clock time. This is a measure of the eccentricity of the earth's orbit.
What is the thing that looks like a stretched out 8 on a globe called?
It is called the analemma. It describes the apparent change in position of the sun that results from the tilt in earth's axis, and the libration caused by earth's changing velocity in its orbit around the sun.
Does the sun rise at the same time?
No, the time of sunrise varies throughout the year. If you look up "Equation of Time" and "Analemma" in a search engine you'll be well informed. The day on which sun rises the earliest is NOT the same day upon which it sets the latest! And similarly for mid-winter.
What if earth moved in a circular orbit farther from the sun?
It would be colder on Earth. the farther, the colder. Also solar time and civil time would match up perfectly or nearly so; there would be no need for a 'mean solar day', or 'mean time'. The analemma would be a straight line.
What is the purpose of edsa revolution?
the purpose of this is to have a purpose
