Historical clue formulations

• Like the moon in a solar eclipse — 2023-12-17
• Illuminated from behind — 2023-08-22
• Like a silhouette [19th-century U.K. prime minister] — 2017-05-30
• Like E.T. riding Elliott's bicycle — 2015-12-18
• Illuminated from behind — 2014-12-23
• Like silhouettes, typically — 2007-02-16
• Illuminated from behind — 2003-10-27