What primary strength of the telescope is necessary for successfully viewing faint deep-sky objects like distant galaxies and nebulae?

Answer

Light-gathering power.

Deep-sky objects are very faint because they are distant; therefore, the telescope's ability to collect as much ancient, faint light as possible is its most essential strength for viewing these structures.

What primary strength of the telescope is necessary for successfully viewing faint deep-sky objects like distant galaxies and nebulae?
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