What is the primary operational difference cited for the Hobby-Eberly Telescope (HET) compared to Keck or LBT?

Answer

It is optimized for spectroscopy and operates at a fixed tilt angle.

The HET design allows it to observe large sections of the sky in one pointing while operating at a fixed tilt angle, making it specifically optimized for spectroscopic studies, such as probing dark energy.

What is the primary operational difference cited for the Hobby-Eberly Telescope (HET) compared to Keck or LBT?
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