Simplify the following text for a Grade 12 native English-speaking person.
Original: Tip-tilt mirrors are effectively segmented adaptive optics mirrors having only one segment which can tip and tilt , rather than having an array of multiple segments which can tip and tilt independently .
Simplified: Tip-tilt mirrors are effectively segmented mirrors having only one segment which can tip and tilt , rather than having an array of multiple segments that can tip and tilt independently .