Historical clue formulations

• Optical device with segmented mirrors — 2023-09-05
• One taking the long view? — 2021-03-28
• Help for a star witness? — 2019-02-06
• Means of spotting this puzzle's theme? — 1995-05-10
• Shorten — 1995-01-07
• Hubble, e.g. — 1994-04-18