Question

Surface temperature of Sun is about?
A. 5000 degree celsius
B. 5500 degree celsius
C. 6000 degree celsius
D. 6500 degree celsius

Answer 1

Hint: The Sun comprises 98 percent of hydrogen and helium. The surface gravity of the Sun is 274 metres per second square which is 28 times the gravity of the Earth.

Complete Answer: The period of rotation of the Sun is 25 days and 9 hours and the speed of rotation is 7179.73 km /hrs. The age of the Sun is 4.6 billion years with a surface temperature of 6000-degree Celsius and 16 million degree celsius in the core. It is equivalent to 3,32,900 earth masses, composed of approximately 98 percent of hydrogen and helium. It rotates in a counter-clockwise direction.

The bright white disc that appears in the sky is the layer of the sun called the photosphere. The photosphere is essentially the surface of the Sun - it emits the visible that we see here on Earth. The solar atmosphere is divided into three layers, the chromosome, the transitional zone, and the corona. The chromosphere is a pinkish layer where much of the stormy weather on the sun is detected. The transition zone is where the temperature rises sharply from the 6000-degree temperatures in the photosphere and chromosphere to levels in excess of one million degrees in the corona. The word corona comes from the Latin for crown, extending in all directions millions of kilometres away from the disc. It is caused by sunlight scattering onto, and projecting off, electrons and interstellar dust.
So, the correct answer is option C.

Note: In 1611, Galileo first reported seeing sunspots on the surface of the Sun. These are minor regions or spots where the temperature of a small area of the photosphere is markedly cooler than its surroundings.