"Artist’s impression of the old white dwarfs WDJ2147-4035 and WDJ1922+0233 surrounded by orbiting planetary debris, which will accrete onto the stars and pollute their atmospheres. WDJ2147-4035 is extremely red and dim, while WDJ1922+0233 is unusually blue. Credit: University of Warwick/Dr. Mark Garlick" (ScitechDaily/Astronomers Discover Oldest Planetary Debris in Our Galaxy – Remnants of Destroyed Solar System") In space is a binary star system of two white dwarfs WDJ2147-4035 and WDJ1922+0233. The age of WDJ2147-4035 is about 10,7 billion years old and it spent the 10,2 billion years cooling as a white dwarf. WDJ1922+0233 is much younger. And it's almost sure. That those white dwarfs impacted each other. Then they started to orbit each other. So those white dwarfs have been separated a long time ago. An interesting thing is that white dwarfs are remnants of the stars, quite similar to the sun. If the red participant of the binary star WDJ2147-4035 was really li