Is the game over when you reach the center of the universe in Spore?

Hi, I want to know whether the game is over when you reach the center of the universe in Spore.Is the game over when you reach the center of the universe in Spore?
The Game is not over, but you just beat the hardest part of it. Afterwords, you arent able to go back to the center, put you can still play. You get the staff of life and the award '42'.