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Question 3:
If Xena were half as reflective, do you think astronomers would have found this icy body?

You might think that astronomers still would have discovered Xena because it is slightly larger than Pluto. This answer is incorrect. Xena is small and far away from Earth. Astronomers spotted Xena because it reflects lots of light. Xena is so far away that, if it did not reflect as much light as it does, it would be too dim for astronomers to see with telescopes.

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