To the Egyptians, the sun represented light, warmth, and growth. This made the sun deity very important as the sun was seen as the ruler of all that he created. The sun disk was either seen as the body or eye of Ra.
Ra was thought to travel on two solar boats called the Mandjet (the Boat of Millions of Years), or morning boat and the Mesektet, or evening boat. These boats took him on his journey through the sky and the underworld. When Ra traveled in his sun boat he was accompanied by various other deities including Sia (perception) and Hu (command) as well as Heka (magic power). Sometimes members of the Ennead helped him on his journey, including Set who overcame the serpent Apophis and Mehen who defended against the monsters of the underworld.
Apophis, an enormous serpent tried to stop the sun boat’s journey every night by consuming it or by stopping it in its tracks with a hypnotic stare. In the evening the Egyptians believed that Ra set as Atum or in the form of a ram. The Mesektet or Night boat would carry him through the underworld and back towards the east in preparation for his rebirth. These myths of Ra represent the sunrise as the rebirth of the sun by the sky goddess Nut, thus attributing the concept of rebirth and renewal to Ra and strengthening his role as a creator god.