WOH G64 is what's known as a red giant, a star nearing the end of its life, running out of hydrogen fuel. Through this process, aging stars expand about 100 to 1,000 times their original size. But this particular star is what's sometimes called a red super giant because it's so exceptionally huge.

Scientists have finally imaged a star outside of the Milky Way for the first time. Here's what it looks like and how they did it.