Other crossword clues for answer "MERCURY"MERCURYIt has virtually no atmosphereFirst mission to put an American astronaut in space*"The Winged Messenger"Thermometer elementFirst rock from the sunSun's immediate neighborIt falls in winterClue for 17-, 27-, 45- and 58-AcrossHgGod of science.Planet nearest the sun.Element from cinnabar.Planet nearest to the sun60's space projectWith 1-Down, first American astronautsSee 20-AcrossHermes, to HoraceIt orbits the sun in 88 daysBarometer fillerNearest planet to the sunVenus neighborRoman god of trade