Mira A is a variable red giant star estimated to be about 700 times larger then our own sun. While Mira A has been observed since the 1600’s, it’s companion star Mira B was discovered in the early 1900’s. This depiction illustrates the stellar material transfering from the red giant to it’s smaller companion. This forms a disk of material around the smaller star. These stars are shown as they would appear in visible light.