Why is it sometimes difficult for scientists who study outer space to find meteoroids, even large ones?
A It is believed that meteoroids no longer exist in the atmosphere of Earth.
B Scientists often do not know where to look to find meteoroids.
C Meteoroids do not give off their own light and can be seen only if they reflect sunlight.
D Large meteoroids are made of ice and usually melt before scientists can see them.
Why is it sometimes difficult for scientists who study outer space to find meteoroids, even large ones?
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The correct answer is C: Meteoroids do not give off their own light and can be seen only if they reflect sunlight.
Explanation: Meteoroids are typically dark and do not emit light on their own, making them difficult to spot in the vastness of space. They can only be observed when they reflect sunlight, which often makes them hard to detect, especially if they are small or in areas of the sky with a lot of background light.