The phrase "launched into eternity" refers to the moment of passing away or death. However, there are numerous synonyms available to describe this solemn moment. Some of the most commonly used synonyms for this phrase include "passed away," "departed," "left us," "went to their eternal rest," "left this world," "gone to heaven," "resting in peace," "ceased to exist," "completed their journey," "crossed the divide," and "joined the angels." These synonyms are often used to describe the passing of loved ones and can offer a more compassionate and respectful way of expressing this solemn moment.