Meaning of "Back Down to Earth" by Carly Simon

The lyrics of "Back Down to Earth" by Carly Simon paint a picture of a relationship that starts off with high hopes and big dreams, symbolized by jumping into a river on the moon and trying to buy the morning star. However, the cold water and the fact that the star was already sold represent the harsh realities and obstacles that get in the way of their aspirations. The speaker had envisioned a successful future with their partner, but as their plans fall apart, they are left alone, back on the road without the person they thought would be their "summer angel." The song captures the disappointment and heartbreak of realizing that their dreams were too ambitious and now they must face the realities of life on their own.