Historical clue formulations

• Cosmic cloud — 2026-08-03
• Galactic cloud — 2026-03-16
• Cloud in outer space — 2024-03-04
• Annual award presented by the Science Fiction and Fantasy Writers of America — 2023-06-14
• Crab ___ — 2022-02-05
• ___ Awards (annual prizes for science fiction and fantasy) — 2020-09-02
• Annual science fiction award — 2019-01-13
• Cloud in space — 2016-06-28
• Hubble sighting — 2014-03-01
• Orion ___ — 2012-09-27
• Part of a galaxy — 2011-11-07
• Interstellar matter — 2008-03-14
• Cloud of gas and dust — 2007-12-16
• Distant cloud — 2007-01-14
• Sci-fi author's award — 2005-07-09
• Observatory sighting — 2003-10-26
• Crab ___ — 2002-04-07
• Astronomer's sighting — 2000-06-15
• Interstellar cloud — 1998-01-26
• Spiral ___ — 1997-03-23
• Mount Palomar sighting — 1994-10-02