Terra

Galactica in orbit of Terra.

The planet Terra is home to the Terran Nationalists and the Eastern Alliance. The Eastern Alliance would have eliminated the Nationalists in a nuclear attack if not for the intervention of Apollo and Galactica. Despite hopes that Galactica had finally reached its destination, it is revealed that Terra is not Earth ^{(TOS: "Experiment in Terra")}.

Colonists from Terra founded the Lunar Colonies. Galactica first encounters "Earthlings" when they discover a ship from the Lunar Colonies. The people aboard were attempting to flee the influence of the Eastern Alliance by traveling to Paradeen ^{(TOS: "Greetings From Earth")}.

The Link to Earth

In the episodes "Greetings From Earth" and "Experiment in Terra" there are clues pointing to the people of Terra being descendants of the Thirteenth Tribe:

• The names of Terrans are Earthling names (e.g. Michael, Brenda), with a first and last name that is consistent with a great deal of Earth's cultures.
• Terra is Latin (and Gemonese) for Earth.
• The Terrans have never heard of centons as the Terran Michael asks Apollo what a centon is.
• Shots of Terra in "Experiment in Terra" look conspicuously like Earth herself, notably the North American continent.

Re-imagined Series definition: a nickname used as a substitute for an aviator's given name in wireless communications and in conversation

Original Series definition: a unit of time akin to a "minute"; in earlier episodes (e.g. "Saga of a Star World," "Lost Planet of the Gods, Part I"), centon is used as the Colonial equivalent of a week before being retconned in later episodes