What Does the Word Seeing Mean to an Astronomer Using

question 244

Multiple Choice

What does the word seeing mean to an astronomer using a telescope?

• A) the twinkling and blurring of the image due to turbulence in Earth's atmosphere
• B) the combined effects of aberrations in the components of the telescope, particularly spherical and chromatic aberration
• C) the effect of wind on the telescope that causes it to vibrate, thereby blurring the image
• D) the haze or thin cloud in the atmosphere that reduces the brightness and sharpness of the telescope image

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