The Oort cloud is comprised of a swarm of potential comets.
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Q11: Very few extrasolar planets have been discovered.
Q12: Terrestrial planets have rocky cores and few
Q13: It is likely to find frozen methane
Q14: The largest of the trans-Neptunian objects (TNOs)are
Q15: Extrasolar planets have not yet been imaged
Q17: Jovian planets have volcanic features on their
Q18: In increasing distance from the Sun,the correct
Q19: In differentiation,iron-rich materials float to the surface
Q20: The Sun and planets formed from a
Q21: Earth has an average density of 5500
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