Ragnar is the second largest planet in all of the Twelve Colonies' star systems and is a gas giant that orbits both the Helios Gamma and Helios Delta star systems, having been dislodged from its former orbit in the Helios Gamma system by the planet Ophion. During the "Miniseries", then-Commander Adama takes the Galactica there for supplies and weapons from the Ragnar Anchorage, which was in low orbit around the planet. Ragnar's natural radiation was discovered to be damaging to the Cylons, who avoided the planet and allowed the refugee fleet to hide here temporarily before fleeing the system. Ragnar's atmosphere is mined for its plentiful hydrocarbons that are used at the weapons depot, Ragnar Anchorage, that orbits it.