SOLAR SYSTEM

UNIVERSE

THE SUN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a Sunspot?
A
Areas of gas which are much hotter than the gas surrounding them.
B
The sun’s acne
C
Areas of gas cooler than the gas surrounding them.
D
Solar Flare
Explanation: 

Detailed explanation-1: -Sunspots are areas that appear dark on the surface of the Sun. They appear dark because they are cooler than other parts of the Sun’s surface. The temperature of a sunspot is still very hot though-around 6, 500 degrees Fahrenheit!

Detailed explanation-2: -Sunspots appear dark because they are cooler than their surroundings. Large sunspots are thousands of degrees cooler than the areas that surround them (about 4, 200 °C for a sunspot compared to 6, 000 °C for the photosphere surrounding it).

Detailed explanation-3: -The center of each granule is hot material rising from the sun’s interior, while the edges are cooler material sinking downward.

Detailed explanation-4: -The sunspots appear relatively dark because the surrounding surface of the Sun (the photosphere) is about 10, 000 degrees F., while the umbra is about 6, 300 degrees F. Sunspots are quite large as an average size is about the same size as the Earth.

Detailed explanation-5: -However, the intense magnetism of sunspots inhibits convection and the associated heat transport to them. Therefore, their temperatures range from about 5, 000 to 7, 600 degrees Fahrenheit (F), cooler than their surroundings, which hover around 10, 000 degrees F.

Detailed explanation-6: -The surface of the Sun that we see is called the photosphere. The dark patches on the surface are called sunspots and are cooler than the rest of the surface. Whilst the photosphere has a temperature of around 6000 °C, sunspots are between 3000 °C and 4000 °C.

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