GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Scientists think that planetary systems are ____ in the universe.
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unheard of
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rare
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common
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None of the above
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Explanation:
Detailed explanation-1: -Almost certainly yes. Nearly every star in the night sky is likely to have planets around it. Astronomers don’t yet know for certain if any of those planetary systems are like ours. But they hope to find out soon.
Detailed explanation-2: -Our Milky Way galaxy is just one of the billions of galaxies in the universe. Within it, there are at least 100 billion stars, and on average, each star has at least one planet orbiting it. This means there are potentially thousands of planetary systems like our solar system within the galaxy!
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