It may be one of the most iconic sights in the night sky, but astronomers have never seen the Helix Nebula like this before.
Astronomers captured bubbling cells of gas 75 times as wide as the sun in this red giant star For the first time, astronomers have watched gas boil and bubble on the surface of a distant star.
Astronomers have, for the firs time, captured images of a star other than the sun in enough detail to track the motion of bubbling gas on its surface. The images show giant, hot bubbles of gas, 75 ...