Answer: MERCURY
MERCURY is a crossword puzzle answer that we have spotted 17 times.
Referring Clues:
- Thermometer element
 - First rock from the sun
 - It falls in winter
 - Barometer filler
 - Element #80
 - Roman God messenger
 - 60's space project
 - Metallic element
 - Element 80
 - Planet nearest to the sun
 - Liquid metal
 - Quicksilver
 - With 1-Down, first American astronauts
 - Clue for 17-, 27-, 45- and 58-Across
 - Nearest planet to the sun
 - See 20-Across
 - Hg
 
Last Seen In:
- LA Times - June 20, 2021
 - New York Times - December 12, 2018
 - Universal - December 19, 2015
 - LA Times - August 22, 2014
 - New York Times - April 23, 2014
 - Universal - December 14, 2013
 - King Syndicate - Thomas Joseph - July 18, 2013
 - Washington Post - July 31, 2008
 - LA Times - June 29, 2008
 - Washington Post - September 11, 2002
 
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