In Latin aster means star, the name also used by the Greeks for this flower. The "star-flower" was believed to be sacred to the gods and so wreaths of asters were placed on their altars.

The god Jupiter, angered by all the fighting and destruction from these iron weapons decided to destroy the entire race by a flood.  The gods fled the earth and the last to go, the goddess Astraea, was so saddened she asked to be turned into a star. Meantime, two mortals who had been faithful to the gods fled to the top of Mount Parnassus and were spared by Jupiter. 

When the flood waters receded, all that was left around the two mortals was mud and slime. Astraea felt so sorry for them she wept, her tears falling as stardust which, when upon hitting the earth, turned to lovely starflowers or asters.