UNIVERSE
METEORITES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False-Comets are light when it is near the sun, and they are vaporizing.
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Either A or B
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None of the above
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Detailed explanation-1: -Comets do not melt in the strict sense of becoming liquid. However, since they are composed partly of ice and other volatile compounds, they vaporize (turn directly to gas) when warmed in the vacuum of space by passing near the sun.
Detailed explanation-2: -Comets are very large in size but they appear to be small as they are far from our Earth. They are large dirt particles . They can’t emit their own light so when they come near to sun the light falls on comet and they shine. So Comets become visible only when they are near the sun.
Detailed explanation-3: -When comets get closer to the Sun, they lose material with each orbit because some of their ice melts and vaporizes. Asteroids typically remain solid, even when near the Sun.
Detailed explanation-4: -Comets are nearly invisible except when they get close to our Sun. As a comet approaches our Sun, it begins to heat up and the ice begins to sublimate-to change from a solid to a gas with no liquid stage. Some of the dust is left behind as the ice sublimates.