UNIVERSE
SURVEY OF THE PLANETS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Orbit a star
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Clear path of other planets
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create light from nuclear reaction
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have enough gravity to be nearly round
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Detailed explanation-1: -Because planets do not have nuclear fusion, they do not produce their own light. Instead, they shine with light reflected from a star. When we see planets in the night sky, such as Venus, the so-called “Evening Star, ‘’ we’re seeing reflected sunlight.
Detailed explanation-2: -The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radiation, and is the most important source of energy for life on Earth.
Detailed explanation-3: -Planets do not emit light. However, they become visible due to reflection of light falling on them. The planets are much closer to the earth and thus can be considered as the extended source of light.
Detailed explanation-4: -A planet is made of rock and metal and produces no light of its own. A planet shines because it reflects the light of the Sun. We see planets in the night sky, such as Venus, the so-called “Evening Star.” Stars have their own light and twinkle in the night, but planets do not.