Chandra Pinpoints Cause of Galactic Wind.

NASA's Chandra X-ray Observatory has revealed the effects of powerful winds launched from the center of the nearby spiral galaxy NGC 253, which is located 11.4 million light-years from Earth. The galactic wind is composed of gas with temperatures of millions of degrees that glows in X-rays. An amount of hot gas equivalent to about two million Earth masses blows away from the galaxy's center every year. The focused nature of the wind observed by researchers supports the idea that the super star clusters are a major source of the wind.