Moonbase One

Moonbase One, or Luna 1, is one of Cybertron's moons, with the others naturally being Moonbase Two, Moonbase 3, and Moon Base Four.

Fiction

The Transformers cartoon

In 2005, it was primarily an Autobot command base during fight against Decepticon-controlled Cybertron. Many Autobots were stationed on Moonbase One, including Optimus Prime, Ratchet, Ironhide, Prowl, Brawn, and the Dinobots, but only Jazz and Cliffjumper were left behind when Optimus Prime went to provide reinforcements to Autobot City.

Not too long afterwards, Moonbase One was targeted and devoured by Unicron. It spent a while being slowly digested within Unicron's bowels, up until he was obliterated by a mystical glowing thingy. The Transformers: The Movie

Animated

Moon Base One is Cybertron's inner moon, and serves as a major industrial center with plenty of energon farms and processing facilities. The AllSpark Almanac II

Exodus

Moon Base One was built during the Golden Age of Cybertron. It was occupied by Starscream's Seekers during the civil war, and Sentinel Prime was imprisoned there after a disagreement with Megatron after he was kidnapped and taken to Kaon. Transformers: Exodus

IDW Generation 1 continuity

This section covers fiction that is ongoing. It will be added to as the story progresses. If it isn't current, you can help by updating it.

Luna 1, the largest of Cybertron's two moons, vanished at some point in the ancient past. The Death of Optimus Prime Legend has it that it was destroyed during the battle between the death god Mortilus and his fellow gods, the Guiding Hand. You, Me, and Other Revelations This religious version of events didn't roll with everyone, and instead a common belief among Cybertronians was that the "Seething Moon", as it was nicknamed, had simply been lost in space somehow. Many believed that if found, the legendary satellite would hold answers to many mysteries. Before & After Others like Trailbreaker didn't believe it existed at all. The Chaos of Warm Things

Over the years, many attempts were made to find Luna 1, but none were successful. Tailgate claimed to have coordinated the first search in the time of Nova Prime over six million years ago. How Ratchet Got His Hands Back Senator Shockwave desired to find both Luna 1 and Nova's Ark, using his influence in the Senate to look for them. Post Hoc Dominus Ambus and Rewind also went on a hunt for it, returning empty-handed some time after the war had broken out. Before & After At least one more "Moonquest" took place during the war when Hot Rod vowed to find Luna 1, this time with Swerve partaking in it. You, Me, and Other Revelations How to Say Goodbye and Mean It

When Vector Sigma was reignited, Cybertron automatically began reviving its moons as well by transmitting energy to them, but the absence of Luna 1 caused its share of the energy to gather in the atmosphere instead. The atmosphere was superheated into a plasma state, causing "ball lightning" effects to strike Cybertron's surface until Wheeljack put up a temporary satellite to draw the energy away. Stick Together

Where countless others had tried and failed, the crew of the Lost Light rediscovered Luna 1 after venturing through a mysterious portal in search of Ultra Magnus. To their surprise, Luna 1 was already inhabited--by no fewer then a billion people. After assembling a team of explorers and descending to the surface, Rodimus discovered that the "people" on Luna 1 were in fact dormant sparks, all of which became active once more as soon as he set foot on the ground. Luna 1 was a hot spot, a place where sparks were born, called the Seething Moon because it was seething with life.

It also turned out they weren't the first to find it when Rodimus's team was ambushed by the Titan Hunters and Pharma. Remain in Light 1 of 5: The Fecund Moon

While pursued by the Titan Hunters, the team discovered an enormous field of dead Metrotitans. When flying into the Titans' corpses to escape their attackers failed, most of the team was captured and brought to face Chief Justice Tyrest, who was using Luna 1 as his own personal moonbase. Remain in Light 2 of 5: House of Ambus

Rodimus returned to the hot spot after Tyrest's defeat but was unable to get it to re-ignite. He speculated that the field had only ignited because he held a piece of the Matrix of Leadership, and with it destroyed in the foiling of Tyrest's plans the hot spot returned to dormancy. Rodimus scattered the Matrix fragments over the spark field before departing Luna 1; Fortress Maximus and Red Alert stayed behind to deal with Decepticon activity in the region. The Lost Light departed, never discovering the five planetary engines on the dark side of the moon or the strange gear-like hieroglyph set in it... This Calamitous Life The Sound of Breaking Glass

Notes

• Cybertron's two (or three, or four) moons were first shown in the movie. At no point were any Cybertronian satellites seen in the first two seasons of the cartoon, making their presence in the movie a bit of a mystery. However, a "drunken" Megatron does refer to Cybertron as 'the land of the metal moon' in "Microbots".
• It may or may not be the same thing as Moon Alpha, which originated in the Dreamwave Generation One continuity.