Assertion: newtonian telescope's mirror | /r/HasProperty | parabolic
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Source sentences:
text: Newtonian telescope offers a 4.5" parabolic mirror to capture the sharpest views of comets on their journey toward the Sun, whether they are big and bright or diminutive and faint.
text: The primary mirror can be parabolic (large diameter of the lens) or spherical (small diameter of the lens).