The Sins of a Solar Empire website announces the release of the Stellar Phenomena DLC for Sins of a Solar Empire: Rebellion, Ironclad's space strategy expansion. Here's a bit on what it offers:

Nine new deep space anomalies populate the void. Skirt the boundary of a deadly black hole, mine the riches in the wreckage of a devastating fleet battle or recharge at an inexplicable fountain of antimatter tearing apart the fabric of space-time. Each anomaly’s all-new gameplay effect adds variety and strategic opportunities to every map.

In addition, Stellar Phenomena lets players seize the moment with 11 optional random events that can alter the fate of not just your empire but the galaxy at large. Stars launch volatile gases that shut down orbital operations, mobile storms wreak havoc across the solar system, and conquered factions sense your weakness and seek to reclaim their worlds.