Images from the 5-Meter Telescope at Mount Palomar Are Not

question 191

Multiple Choice

Images from the 5-meter telescope at Mount Palomar are not as clear as they were when the telescope was first put into operation over 60 years ago. Why is this?

• A) The quality of the mirror has degraded significantly over time.
• B) Precession has changed the positions of a number of important targets so that they are no longer accessible from Palomar.
• C) The telescope was recently damaged by an earthquake.
• D) Light pollution has increased significantly in the past 60 years.

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