People of Earth will know about crimes committed here, though it won't happen soon. Our colleagues staying here are already preparing machines that carry messages about what happened here. About the war, the found life and the further flight...
Part of the equipment will remain here for the construction of a small Ark. If the researchers decide to leave the planet we will always be waiting for them.
Now we have to harvest the resources we need, start the Ark's engines and fly dreaming about our new home...