Planets used in the Battle of Serenity Valley game
Splat Tag: Hudson, Wisconsin
Information gathered from Wikipedia.com (Alliance central computer archives)

Ariel is a central planet of the Union of Allied Planets. It is home to a major medical center (named Saint Lucy's) of the Alliance's solar system. The majority of the action of the episode "Ariel" occurs on this planet. Ariel could be named after one of Uranus' moons in the system of "Earth that was," which gets its name from the sprite in William Shakespeare's The Tempest. The crew of Serenity arrives on this planet for a heist on an advanced medical facility. Alliance controlled planet.

Bellerophon, seen in the episode "Trash", is an Alliance moon and home to the wealthy. It has both a large ocean and an empty area of desert climate, complete with canyons, rock and sand. Isis Canyon is pointed out as the most deserted spot on the world. Bellerophon Estates, large self-contained estates that hover above the moon's ocean, are described as having "gracious living, ocean views and state-of-the-art security." Durran Haymer, a collector of priceless Earth That Was artifacts, lives in Bellerophon Estates. The planet is named after a hero in Greek mythology. "Bellerophon" is also the unofficial name of 51 Pegasi b, the first extrasolar planet to be discovered. Alliance controlled planet.

Greenleaf is an Alliance planet. Located 10 hours away from Jiangyin. Mentioned in "Safe" as a location likely to have medical facilities. Alliance controlled planet.

Haven is the home of Shepherd Book, who left the crew during the events of the comic book series titled Serenity: Those Left Behind, and where he resided in the movie. It was also a place of refuge for the Serenity crew. In the novelization of the film, it is revealed that Haven is a mining planet which is often used as a hiding place for those running from the law (for a fee) and is where some smugglers or criminals decide to settle down. Browncoats controlled planet, and Browncoats Central Headquarters.

Hera is an Earth-like planet with important significance to the Unification War. Serenity Valley is located here, where the the Independent Faction experienced a crushing defeat at the hands of the Alliance. First mentioned in the episode "Serenity". Hera is named after a goddess in Greek mythology, Zeus' wife and sister. In the closed-captioning for the episode "Bushwhacked", it is spelled "Hara". Alliance controlled planet.

Higgins' Moon is a moon where the primary commercial activity is mud farming which is performed by indentured servants called "mudders". The mud is exported offworld and used in the manufacturing of ceramic components. The bulk of the population is impoverished. The moon appears to be owned by a magistrate named Higgins. Jayne became a folk hero to the mudders in the town of Canton due to his role in a botched heist about four years before the time of the Firefly series. The crew visits Higgins' Moon in the episode "Jaynestown." Browncoats controlled planet.

Jiangyin is a border planet located 3 weeks away from Persephone, and also nearby Greenleaf. Alliance law is known to be upheld here. The crew of Serenity sells a cargo load of cattle here in the episode "Safe". The planet is most likely named after a city in China's Jiangsu province along the Yangtze River. Browncoats controlled planet.

Miranda is the name of a planet located beyond Reaver territory. It was home to an Alliance colony with a population of 30 million. The Alliance experimented on the population to find a way to make people more controllable. However the experiments with "G-23 paxilon hydrochlorate", or "Pax", failed: 99.9% of the population became so passive that they essentially lost the will to live. The opposite effect was observed in the remaining 0.1% of the population, who became extremely aggressive and butchered the Alliance scientists in charge of the experiments. This tenth of a percent of the population escaped to become the Reavers. The Alliance tried to cover up what had happened on the planet by creating a story that the colony was lost due to failure in the environmental changes caused during the planet's terraforming process. WARNING: Miranda is Reaver Territory. Travel to this planet is AT YOUR OWN RISK!

Osiris is a wealthy core planet where Simon Tam attended medical school and worked as a trauma surgeon, mentioned in the episode "Serenity". Most likely the location of the Tam Family estate shown in various flashbacks in the episode "Safe". Named after the Ancient Egyptian god of life, death, and fertility, "Osiris" is also the unofficial name of HD 209458 b, the first extrasolar planet to be discovered by the transit method. Alliance controlled planet, and Alliance Central Headquarters.

Paquin is a location mentioned as having a job for Mal and his crew in the episode "Out of Gas". Browncoats controlled planet, and Browncoats controlled planet.

Persephone is a civilized planet with heavily stratified societal structure. The Eavesdown Docks are located here, a commercial port and Badger's base of operations. The Serenity crew lands here periodically to resupply and pick up work. Simon and River Tam, Shepherd Book and the Alliance villain Dobson were picked up here in the episode "Serenity". Book had been living on Persephone at the Southdown Abbey. The planet was also the site of a swordfighting duel between Malcolm Reynolds and Atherton Wing in the episode "Shindig". Persephone's name comes from Greek mythology as the name of the "Queen of the Underworld". Alliance controlled planet.

Triumph is a primitive and poor border moon, apparently self-governed with rather unusual customs and traditions. Elder Gomman is the leader of the moon's settlers or, more likely, one small town's worth of them. Saffron was picked up here in the episode "Our Mrs. Reynolds". Browncoats controlled planet.

 Whitefall is the fourth moon of Athens, a large percentage of which is owned by a woman named Patience. Whitefall is said to not be civilization "in the strictest sense." The crew visits Whitefall hoping to sell their cargo to Patience in the episode "Serenity". According to the RPG, a Blue Sun facility is rumored to be underneath one of the mountains. A security outpost on the planet was later seen in the film Serenity. Browncoats controlled planet.

Planets updated 051808.

"Yes. This is a fertile land, and we will thrive. We will rule over this land, and we will call it...this land. (as Allosaur) I think we should call it your grave! (as Stegosaurus) Ah! Curse your sudden but inevitable betrayal! (as Allosaur) Mine is an evil laugh! Now DIE! (as Stegosaurus) Oh, no, oh God no, oh dear God in heaven..."

~Wash