Historical clue formulations

• Astronomer Carl — 2026-04-28
• See 36-Down — 2024-11-15
• Carl who wrote "Cosmos" — 2024-07-18
• Pioneer in the field of exobiology — 2023-12-08
• Scientist who said "Our planet is a lonely speck in the great enveloping cosmic dark" — 2021-09-28
• Astronomer Carl — 2021-09-02
• "Cosmos" co-creator Carl — 2019-03-18
• Carl who wrote "Contact" — 2018-12-19
• He said "If you wish to make an apple pie from scratch, you must first invent the universe" — 2018-08-17
• Astronomer whose show won three Emmys and a Peabody — 2016-12-17
• Astronomer who wrote "Pale Blue Dot" — 2015-07-05
• "Pale Blue Dot" author — 2012-12-28
• Carl who hosted "Cosmos" — 2012-07-30
• Astronomy figure — 2011-05-26
• "Contact" author, 1985 — 2008-11-07
• Author of "Broca's Brain" — 2007-01-18
• Carl who wrote "Contact" — 2006-02-14
• "The Dragons of Eden" author — 2004-08-08
• "Contact" author Carl — 2004-01-27
• Star in astronomy — 2002-11-28
• Host of TV's "Cosmos" — 2001-04-10
• "Cosmos" host — 1999-11-10
• "Broca's Brain" author — 1999-04-01
• "Cosmos" creator — 1998-05-21
• "Cosmos" series creator — 1998-03-26
• Late astronomer Carl — 1997-02-17
• Astronomer Carl — 1995-01-10
• Novelist Francoise — 1994-05-23