Article III of the Constitution establishes that

http://www.law.cornell.edu/constitution/overview

Click on Article III and read, read, read.

Let us know what you determine.

You might actually read the Constitution itself. It's not difficult, it's even in English.

Article III of the United States Constitution establishes the judicial branch of the federal government. It outlines the structure and powers of the federal judiciary, including the Supreme Court. If you have a specific question about Article III, please let me know and I'll be happy to help explain it further.