animalcollector:

A preview of what’s in store for our sun is in view across the galaxy, as a similar star balloons in its dying throes.

This sun twin, called Chi Cygni, lies about 550 light-years away from Earth. As it nears the end of its life, it has bloated in size and begun to pulse in and out like a giant beating heart. These are the telltale signs of a star running out of fuel after billions of years shining bright.