With relation to the Sun, it does, but since the Sun is moving, the Earth moves in a helixal orbit. But, the distance from the Earth to the Sun is 92,957,130 miles, so the circumfrence of that circle would be 584,066,873 miles.
Ambulatory strictly means the ability to walk but in the context of surgery, it refers to patients who are able to leave the hospital the same day as the surgery, without being admitted. Ambulatory surgery is referred to by other names, commonly called minimally invasive surgery, outpatient surgery or same day surgery.
Visits to the physician are considered ambulatory care. Physicians can perform many types of outpatient, or ambulatory, surgeries on patients. Ultrasound scans are common for pregnant women. Getting an x-ray for a broken arm is an example of ambulatory care. Prenatal care for pregnant women is a type of ambulatory care. Ambulatory care can be provided in an optometrist's office. For most patients, ambulatory care tends to be preferable to hospitalization.