Galactic Bubbles Play Cosmic Pinball with Energetic Particles

We all know bubbles from soapy baths or sodas. These bubbles of everyday experience on Earth are only a few inches across, and consist of a thin film of liquid enclosing a small volume of air or other gas. In space, however, there are very different bubbles – composed of a lighter gas inside a heavier one – and they can be huge.

from Chandra Images https://ift.tt/2BUXbdy