What Characteristic of the 10-M Keck Telescope Makes It Fundamentally

question 333

Multiple Choice

What characteristic of the 10-m Keck telescope makes it fundamentally different from older telescopes,such as the one on Mt.Palomar?

• A) It is located in Earth orbit, away from all the distortions of Earth's atmosphere.
• B) It is actually four closely spaced telescopes that can be operated together, as if they were a single telescope.
• C) Its primary mirror is a large, very thin piece of glass that can be deformed rapidly to compensate for seeing.
• D) Its primary mirror is made up of 36 separate mirror segments.

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