There's a dying star zipping through our universe shedding its matter
Mira exists 200-400 light years away from Earth in the constellation Cetus. It actually consists of two stars, the red giant Mira A and the white dwarf Mira B. Both combine to create a dying star. Mira is also a variable star, which means that it's surface oscillates increasing and decreasing it's brightness.
Mira is moving through space at an extremely quick speed--291,000 miles per hour to be exact. NASA's Galaxy Evolution Explorer has done studies of Mira and found that the star is leaving a trail of matter behind it as it goes. This tail of matter is 13 light years in length.