The Week in Space and Physics: Finally, an Exomoon?

The galaxy is full of planets, and those planets should have moons just like those found in our solar system. Normal moons are small, faint, and all but invisible across the vast spans of interstellar space. Almost all contenders are gigantic, more like twin planets than true moons in orbit around a larger world. But a new study, released by the European Southern Observatory, claims to have found plausible evidence of something that could be called an exomoon in a star system almost seventy light-years distant. The remnants of our world, along with any technology we might have left behind, will eventually fall upon this dwarf star.