UNIVERSE
THE SUN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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eastern limb to western limb
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western limb to the eastern limb
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northern limb to the southern limb
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southern limb to the northern limb
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Detailed explanation-1: -Earth rotates or spins toward the east, and that’s why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.
Detailed explanation-2: -In Stonyhurst heliographic coordinates, the left side of the Sun’s face is called East, and the right side of the Sun’s face is call West. Therefore, sunspots are said to move across the Sun’s face from east to west.
Detailed explanation-3: -Sunspots occur when strong magnetic fields emerge through the solar surface and allow the area to cool slightly, from a background value of 6000°K down to about 4200°K. This cooler area appears as a dark spot on the Sun. As the Sun rotates, sunspots on its surface appear to move from left to right.
Detailed explanation-4: -This disappearing act is possible because sunspots are made of magnetism. The “firmament” of a sunspot is not matter but rather a strong magnetic field that appears dark because it blocks the upflow of heat from the sun’s interior.