The PhD is a doctoral degree, specifically called a "doctor of philosophy" degree. This is misleading because PhD holders are not necessarily philosophers (unless they earned their degree in philosophy!). That said, PhD recipients are able to engage in thought experiments, reason about problems, and solve problems in sophisticated ways.
Most Physics PhD programs cover all aspects of the subject from Condensed Matter, Atomic and Biological Physics on-campus while Astronomy, Particle Physics and Nuclear Physics are often located on large, shared international facilities due to the expensive equipment required for such research.
The United States of America is a large country in North America, often referred to as the "USA", the "US", the "United States", "America", or simply "the States". American colleges are funded by "tuition" charged to the student, which is often quite expensive, very commonly reaching into the tens of thousands of dollars per year.
Ruston is located in Louisiana, USA. The city is served by several higher education facilities. Ruston is famous for the peach festival which attracts the attention of many local and foreign students.
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