Historical clue formulations

• Shooting stars — 2021-10-14
• Things seen in a shower — 2017-11-03
• Blazing successes — 2016-08-28
• Planet threateners — 2013-11-02
• Falling rocks — 2011-08-19
• Showy streakers — 2010-01-31
• Shooting stars — 1997-07-21
• Fireballs — 1996-07-27