Earth: the new home of the survivors
This Earth was the world settled by the survivors of the Twelve Colonies and their humanoid Cylon allies at the end of their long flight. Already home to primitive humans, it became the cradle of a new lineage descended from Hera Agathon.
This Earth was a planet that was settled by refugees from the Cyrannus Star System and humanoid Cylons at the end of their long flight. It was named after Earth, the long-dead world of the Thirteenth Tribe, for which the refugees had been searching for years. (Battlestar Galactica, "Daybreak, Part II"; Battlestar Galactica, "Revelations")
Settlement#
This Earth was settled by refugees from the Cyrannus Star System together with humanoid Cylons who had joined them. They named it after the earlier Earth, the world of the Thirteenth Tribe that the refugees had spent years searching for, only to find it a nuclear ruin. (Battlestar Galactica, "Daybreak, Part II"; Battlestar Galactica, "Sometimes a Great Notion")
The world was already inhabited by a vast amount of creatures and covered by lush grass landscapes. Tribal human beings were the primary lifeform on the planet, and they possessed the same DNA as the humans of the fleet. This provided a perfect match for breeding and thus for the survival of the human race. (Battlestar Galactica, "Daybreak, Part II")
Hera Agathon and the new lineage#
It was on this Earth that Hera Agathon grew up and began what was regarded as the maternal lineage for all the humans of the generations that followed. Some 150,000 years later, in modern times, scientists of the planet unearthed the fossil of the figure they came to call their Mitochondrial Eve. (Battlestar Galactica, "Daybreak, Part II")
Modern Earth#
By the time of those discoveries, the civilization of Earth was in the midst of a technological boom. Its people had already become capable of building robots. That present-day coda closes the series finale, "Daybreak". (Battlestar Galactica, "Daybreak, Part II")
Frequently asked questions
- What was this second Earth?
- This Earth was a planet settled by refugees from the Cyrannus Star System and humanoid Cylons at the end of their long journey. It was named after the earlier Earth, the long-dead world of the Thirteenth Tribe, for which the refugees had searched for years.
- Was Earth already inhabited when the survivors arrived?
- Yes. The world was already home to a vast number of creatures and covered by lush grass landscapes. Tribal human beings were the primary intelligent lifeform on the planet, and they shared the same DNA as the humans of the fleet, providing a genetic match for breeding and the continuation of the human race.
- Why was Hera Agathon important to Earth's history?
- It was on this Earth that Hera Agathon grew up and began what was held to be the maternal lineage for all the humans who followed in later generations. Some 150,000 years later, scientists of the planet's modern civilization unearthed the fossil of the figure they called their Mitochondrial Eve.
- What became of Earth's civilization?
- Over the 150,000 years that followed, the people of Earth developed into a modern civilization. By modern times they had entered a technological boom and were already capable of building robots.
Sources
- EpisodeBattlestar Galactica, "Daybreak, Part II", Season 4, Episodes 20 and 21 (2009)
- EpisodeBattlestar Galactica, "Revelations", Season 4, Episode 10 (2008)
- EpisodeBattlestar Galactica, "Sometimes a Great Notion", Season 4, Episode 11 (2009)
Spotted a factual error or a primary source we missed? Email a correction. Every flagged claim gets reviewed.
Followed from this entry

Earth
Earth was a world settled by the Thirteenth Tribe roughly four thousand years before the fall of the Twelve Colonies. Once home to a flourishing Cylon civilization, it was reduced to a radioactive ruin by a nuclear holocaust, and the Colonial fleet abandoned it days after at last reaching it.

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Cylon
The Cylons were a race of sentient machines created as military robots by Graystone Industries on Caprica. Built from research into artificial consciousness, they rebelled against their human masters, fought a long war, and forty years later returned to annihilate humanity.

Cyrannus: the Colonies' four suns
Four stars in a double binary, Helios Alpha through Delta, holding all Twelve Colonies. Refugees from Kobol settled them two thousand years back.

Hera Agathon
Hera Agathon was the first human-Cylon hybrid to exist, born to a Colonial officer and a Number Eight Cylon in the first month after the Fall of the Twelve Colonies. Held to be central to God's plan for both races, she was known before her birth as the Shape of Things to Come.

Battlestar Galactica Timeline: every major event from Kobol to the arrival on Earth
The Reimagined Series chronology in order, from the exodus from Kobol and the death of the first Earth to the Fall of the Twelve Colonies and the fleet's arrival 150,000 years ago. A shorter section at the end covers the separate 1978 series and Galactica 1980.
Mentioned in5 entries
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