What is the shape of the segmented mirrors of twin Keck Observatory telescopes, Gran Telescopio Canarias, and the James Webb Space Telescope (scheduled to be launched in late 2018) ?
A) spherical
B) hexagonal
C) rectangular
D) triangular
E) octagonal

Question

Quizplus · Accepted Answer

The segmented mirrors of the twin Keck Observatory telescopes, Gran Telescopio Canarias, and the James Webb Space Telescope are all made up of hexagonal segments. This allows for a larger effective mirror diameter while still being able to transport and assemble the individual segments.

What Is the Shape of the Segmented Mirrors of Twin