According to the Supreme Court of the United States, there are nine Supreme Court Justices. On of the justices serves as the Chief Justice for a lifetime appointment.
According to US History, nominations for a Supreme Court Justice ultimately come from the U.S. President. However, U.S. Senators, government agencies and the American Bar Association often make recommendations. The president then selects one nominee from many options to send for confirmation by the U.S. Senate. Confirmation hearings in the U.S. Senate offer an opportunity for the public to gain insight into the nominee's previous experience and previous rulings. Confirmation hearings take part in the Senate Judiciary Committee before a final floor vote.