Billions of years from now, the sun is expected to run out of fuel and greatly expand into what is called a red giant, eventually shedding its outer layers and leaving behind its dense core, a white dwarf. Some of the planets in our solar system would be destroyed while others might survive.Researchers have now spotted a white dwarf with planetary debris swirling around it in an unusual configuration that may offer a peek into one possible outcome for our solar system in the distant future.Unl...