what is differential rotation for the sun and how does it affect the motion of sunspots on its surface?
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The Spinning Sun The number of sunspots you can count on the Sun's surface is not always the same, but varies over time. Solar activity is directly related to the frequency of sunspots. Here is a plot showing the number of sun spots since 1995: ROTATION: The sun does not rotate as a rigid body. It is a gas from its outermost layers down to its centre. The equatorial region of the photosphere rotates faster than do regions at higher and lower latitudes. This is called differential rotation. The differential rotation of the Sun's latitudes causes its magnetic field lines to become twisted together over time, causing magnetic field loops to erupt from the Sun's surface and trigger the formation of the Sun's dramatic sunspots and solar prominences.
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Earthtalk: Do sunspots and solar flares affect climate change? Some skeptics of human-induced climate change blame global warming on natural variations in the sun’s output due to sunspots and/or solar wind. They say it’s no coincidence that an increase in sunspot activity and a run-up of global temperatures on Earth are happening concurrently.
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Sunspot Reference Terms. from Wikipedia, the free encyclopedia. A sunspot is a region on the Sun's surface (photosphere) that is marked by a lower temperature than its surroundings and intense magnetic activity, which inhibits convection, forming areas of low surface temperature.
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- It has to do with changes in the magnetic field of the Sun and with convection within the outer layer of our star (not with processes in the core). Sunspot activity is closely in phase with ejection of solar plasma (protons mainly) and the ensuing atmospheric fireworks in the polar regions of Earth called aurora.
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Why does the sun not rotate? Let’s look at how the rotation of the Sun changes. A spot on the equator of the Sun takes 24.47 days to rotate around the Sun and return to the same position. Astronomers call this sidereal rotation period, which is different from the synodic period – the amount of time it takes for a spot on the Sun to rotate back to face the Earth. But the Sun’s rotation rate decreases as you approach the poles, so it can actually take 38 days for regions around the poles to rotate once. The Sun’s rotation is seen by observing sunspots. All sunspots move across the face of the Sun. This motion is part of the general rotation of the Sun on its axis. Observations also indicate that the Sun does not rotate as a solid body, but it spins differentially. That means that it rotates faster at the equator of the Sun and slower at its poles.
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Sunspot Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Sunspots usually appear in pairs of opposite magnetic polarity. Their number varies according to the approximately 11-year solar cycle. Individual sunspots or groups of sunspots may last anywhere from a few days to a few months, but eventually decay. Sunspots expan
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Sunspot Reflecting intense magnetic activity, sunspots accompany secondary phenomena such as coronal loops (prominences) and reconnection events. Most solar flares and coronal mass ejections originate in magnetically active regions around visible sunspot groupings.eflecting intense magnetic activity, sunspots accompany secondary phenomena such as coronal loops (prominences) and reconnection events. Most solar flares and coronal mass ejections originate in magnetically active regions around visible sunspot groupings.
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Stellar rotation The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface. The rotation of a star produces an equatorial bulge due to centrifugal force. As stars are not solid bodies, they can also undergo differential rotation.
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The Sun in the sky at different times of the year in the Northern hemisphere The Sun is also a star, so the Sun also rotates around the North Celestial Pole (Because we are so close to the Sun, the tilt of the Earth actually varies the exact axis of rotation of the Sun slightly away from the North Celestial Pole.) It is this rotation that will allow us to use the Sun to tell time.
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- This is because the roundness of the tubes minimize the off-azimuth effect. The reduction in solar power density, if the panel is not square (not incident at 90°) to the sun’s rays, is a cosine function. For example if the angle is 80°, instead of 90°, the sun intensity is still 98% (i.e., cos10°).
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Astronomy for Kids Interesting Facts about Sunspots, Solar Winds, and Flares. 1  Sunspots are actually fairly bright, but they appear dark because the rest of the Sun is so much brighter. 2  Solar flares are often followed by a large ejection of plasma from the surface of the Sun called a Coronal Mass Ejection (CME).
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Question: The amount of magnetic flux that rises up to the Sun's surface varies with time in a cycle called the solar cycle. This cycle lasts 11 years on average. This cycle is sometimes referred to as the sunspot cycle. Near the minimum of the solar cycle, it is rare to see sunspots on the Sun, and the spots that do appear are very small and short-lived.
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CHAPTDER 16 REVIEW The greater the eccentricity of the orbit (that is, the more eccentric the orbit), the greater the variation in solar energy received by the earth between its closest and farthest approach to the sun. The second cycle takes into account the fact that, as the earth rotates on its axis, it wobbles like a spinning top.
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Sunspots and climate Sunspots have a diameter of about 37,000 km and appear as dark spots within the photosphere, the outermost layer of the Sun. The photosphere is about 400 km deep, and provides most of our solar radiation. The layer is about 6,000 degrees Kelvin at the inner boundary and 4,200 K on the outside.
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- Answer Wiki. It rotates in the counterclockwise direction (when viewed from the north), the same direction that the planets rotate (and orbit around the Sun). The Sun's rotation period varies with latitude on the Sun since it is made of gas.
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What is direction of rotation of the sun? 1 Answer. It rotates in the counterclockwise direction (when viewed from the north), the same direction that the planets rotate (and orbit around the Sun). The Sun's rotation period varies with latitude on the Sun since it is made of gas.
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How does the tilt of the earth affect seasons? As the earth rotates around the sun, the tilt of the dihedral angle changes with respect to the plane of the earth revolving aorund the sun. The closer to 90° that the earth's surface is to the incoming sunlight, the warmer its going to be.It depends if you are in the northern or southern hemisphere.est Answer: The earth's rotational axis is tilted at 23.5° with respect to the earth's plane of rotation around the sun. That angle is called the dihedral angle and it wobbles a bit, but is generally at 23.5°.
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Why does the earth revolve around the sun clockwise and counterclockwise around itself? In fact the rotation around the Sun is defined counterclockwise. Notice I say defined because it's just that. Mathematically the counterclockwise advance is defined as the positive advance for the angles. As all the planets revolve like this, it's just a matter of defining the north, which historically was set as it is.
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- A solar flare can occur when the magnetic fields at the darker part of the sunspot, the umbra, and the lighter part, the penumbra, are facing away from one another.
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How long is a sunspot cycle? Answer by Fwmh. Confidence votes 80.2K. In a sunspot cycle the magnetic poles of the sun flip, thus while this flipping occurs on average every 11 years, it will in fact take 22 years for the Sun's poles to be back to the same position as when you started measuring.
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What Is Differential Heating? Quick Answer. Differential heating is the term used to explain the ways sunlight heats the Earth's zones differently depending on tilt, revolution around the sun and daily rotation. This process results in what human beings perceive as seasons and other climatic shifts. Continue Reading.
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- These 19 images show the gradual movement of sunspot groups over the Suns surface. The first group (circled in blue) appears on the far left of the 24th of April image and disappears on the far right of the 7th of May image. This group remained visible for 14 days, the duration of the semi-rotation of the Sun.
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Sun Sunspots are spots on the photosphere, or surface of the Sun. These occur due to magnetic activity that reduces the surface temperatures. These occur only once every eleven years. These spots can spread to be 50,000 miles in diameter.
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The Moon and Eclipses This simulated multiple-exposure image shows the positions of the sun and moon with respect to the stars over a nine-day period. While the sun moves eastward (from right to left) only one degree per day, the moon moves eastward by 13 degrees per day.