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The Engraved Hourglass Nebula (also known as MyCn 18) is a young planetary nebula in the southern constellation Musca about 8,000 light-years from Earth. It was discovered by Annie Jump Cannon and Margaret W. Mayall during their work on an extended Henry Draper Catalogue (the catalogue was built between 1918 and 1924).
Dreaming of watching sand flow through an hourglass is a symbol reminding you that time is passing you by, and you need to make the most of each day. Dreaming of an hourglass breaking is an ominous portent of catastrophe or unexpected death. This dream should prompt you to resolve your differences with your loved ones and take advantage of the time you have, because you never know when time will be out for either you or them.