Source: Starfinder Core Rulebook p.107
When you're fully graviton-attuned, you can make time pass more slowly for your enemies. As a standard action, you can project a gravitational wave in a 30-foot cone. You choose which creatures in the cone are affected and which ones aren't. Each target must succeed at a Fortitude save or by affected by slow for a number of rounds equal to your solarian level. At 17th level, even targets that succeed at their saving throws are affected by slow for 1 round.