The six planets orbit their central star HD 110067 in a harmonic rhythm with planets aligning every few orbits. (Image credit: CC BY-NC-SA 4.0, Thibaut Roger/NCCR PlanetS) Late last year, astronomers discovered a fascinating star system only 100 light-years away from us. Its six sub-Neptune planets circle very close to their host star in mathematically perfect orbits, piquing the interest of scientists searching for alien technology, or technosignatures, which they argue would offer compelling e...