By custom, the Court is composed of eight [[Associate Justice]]s and one [[Chief Justice of the United States of America|Chief Justice]]. To assist them there are many clerks, guards, and staff. Cases are heard ''[[en banc]]'' whenever the Court is in session. Historians generally divide Court history into eras named after the Chief Justice then presiding (e.g., the [[Rehnquist Court]] and the [[Warren Court]]). | By custom, the Court is composed of eight [[Associate Justice]]s and one [[Chief Justice of the United States of America|Chief Justice]]. To assist them there are many clerks, guards, and staff. Cases are heard ''[[en banc]]'' whenever the Court is in session. Historians generally divide Court history into eras named after the Chief Justice then presiding (e.g., the [[Rehnquist Court]] and the [[Warren Court]]). |