Which telescopes are best for viewing stars, planets, comets, and the moon?
Reflector telescopes.
Because reflectors and their modified versions are less expensive per inch than refractors, most astronomical telescopes are reflectors due to the problems of spherical and chromatic aberration in refractors.
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Telescopes that are best for viewing stars, planets, comets, and the moon are typically refracting telescopes and reflecting telescopes. refracting telescopes use lenses, while reflecting telescopes use mirrors.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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