GENERAL KNOWLEDGE

GK

THE UNIVERSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following most accurately describes why the Earth receives more energy from the Sun than all of the other billions of stars combined?
A
the sun is larger in size
B
the sun is more dense
C
the sun is hotter
D
the sun is much closer
Explanation: 

Detailed explanation-1: -The sun is a medium size star that appears larger and brighter than other stars because it is closer to us.

Detailed explanation-2: -Nuclear fusion creates heat and photons (light). The sun’s surface is about 6, 000 Kelvin, which is 10, 340 degrees Fahrenheit (5, 726 degrees Celsius). The amount of solar heat and light is enough to light up Earth’s days and keep our planet warm enough to support life.

Detailed explanation-3: -A major advantage to using solar energy is that it is a renewable resource. We will have a steady, limitless supply of sunlight for another 5 billion years. In one hour, the Earth’s atmosphere receives enough sunlight to power the electricity needs of every human being on Earth for a year. Solar energy is clean.

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