Soares-Furtado and Kubiak examine the impact of aging stars on each other. The 5% of known exoplanets found around aging stars bear exotic names like subgiants, red giants, and white'dwarfs, and they have evolved to have vastly different sizes, temperatures, and luminosities than they did when they were young. Any planets around these stars have therefore experienced a dramatic change in circumstances, which in many cases leads to their destruction. With so few examples of these mature planetary systems in hand, it's difficult for us to .know how late-stage planetary evolution unfolds. Nevertheless, the systems we do have serve as critical benchmarks in our quest to trace the complete planetary life cycle. These systems are teaching us that the evolutionary process is in some ways a symbiotic one: Not only do aging stars affect their planets, but the planets also affect their stars.