Some fun milestones: 1  The diameter of the Milky Way is 100,000 light years; the observable Universe had this as its radius when it was approximately 3 years old.  When the Universe was one year old, it was much hotter and denser than it is now. The mean temperature of the Universe was more than 2 million Kelvin.
(high blood pressure) as a cause of chest pain in both men and women is listed first because it is the single most common cause of chest pain, including coronary artery disease itself. In other words, more people suffer from chest pain due to high blood pressure than those who have chest pain because of obstructive coronary artery disease.
If you have unexplained chest pain, the only way to confirm its cause is to have a doctor evaluate you. You may feel chest pain anywhere from your neck to your upper abdomen. Depending on its cause, chest pain may be: Sharp; Dull; Burning; Aching; Stabbing; A tight, squeezing, or crushing sensation; Here are some of the more common causes of chest pain. Chest Pain Causes: Heart Problems. Although not the only cause of chest pain, these heart problems are common causes: Coronary Artery Disease, or CAD. A blockage in the heart blood vessels that reduces blood flow and oxygen to the heart muscle itself.