Fiske seemed shocked at this question. He knew that these people were, well, literally in the dark, but he had no idea that they were truly this... Closed off. To not even know if there was life outside their planetary orbit? Remarkable. Then, Fiske realized, this was the first alien contact they'd likely made since the Aser being they kept referring to visited. This would be a moment in history for their society. That was wonderful... Right?
"Yes," Fiske replied, "In fact, you are but a small dot in the grand scheme of things. Beyond your shadow, there are other planets in this solar system... That is, other planets which revolve around your sun. Beyond that, there are other suns out there, with planets that revolve around them. These solar systems make up this galaxy, the group of stars which are clustered together in this point of space. There are other points in space where clusters of stars lay, other galaxies, such as the one I'm from. Beyond that, there are other... Dimensions. Other places. Places with no space and stars at all."