Homeland, motherland, cradle of creation and civilisation. The first step, the first breath, the first thought were all made on Earth. Even with the invention of the Jump Drive, Earth never lost its importance. It is still the greatest cathedral to humanity ever gifted by God.
After the Exodus, the Consensus were in charge of preserving Earth and their first decision was that it was no longer to be a colonizable world. Now it is abandoned, perfectly preserved, a shrine to the Consensus and the Discontent, perfect in every conceivable way.