Image map of Justices
Seated left to right: Justice Clarence Thomas, Justice Antonin Scalia, Chief Justice John G. Roberts, Justice Anthony M. Kennedy, Justice Ruth Bader Ginsburg.

Standing left to right: Justice Sonia Sotomayor, Justice Stephen G. Breyer, Justice Samuel Anthony Alito, Jr., Justice Elena Kagan.

Supreme Court of the United States: The Court consists of the Chief Justice and eight associate justices. At the Court's discretion, and within certain guidelines established by the Constitution and Congress, the Supreme Court each year hears a limited number of the cases it is asked to decide. Those cases may begin in the federal or state courts, and they usually involve important questions about the Constitution or federal law.

References:
The Supreme Court Historical Society
Supreme Court of the United States - US Government Site

Image Credit:Collection of the Supreme Court of the United States, Photographer: Steve Petteway
John G. Roberts, Jr., Chief Justice Anthony Kennedy, Associate Justice Ruth Bader Ginsburg, Associate Justice Antonin Scalia, Associate Justice Clarence Thomas, Associate Justice Sonia Sotomayor, Associate Justice Steven G. Breyer, Associate Justice Samuel Anthony Alito, Jr., Associate Justice Elena Kagan, Associate Justice