Radio astronomers see what the naked eye can't. As we study the sky with telescopes that record radio signals rather than ...

In CUriosity, experts across the CU Boulder campus answer pressing questions about humans, our planet and the universe beyond. Previously, astrophysicist Jeremy Darling tackled: “What is the biggest ...

The expansion of the universe is, in some ways, similar. But this analogy gets one thing wrong – while the dough expands into the baking pan, the universe doesn’t have anything to expand into.

In essence, the universe’s expansion is an intrinsic process where space itself grows, increasing the separation between galaxies without necessitating an external “outside” to expand into.