How big is the universe? Could it be infinitely large? If the universe has an edge, what is beyond the edge? And if the universe had a beginning, what was going on before that? Our experience of ...

The universe began with a vast explosion that generated space and time, and created all the matter and energy in the universe. Exactly what triggered this sudden expansion remains a mystery.

Edwin Powell Hubble is renowned for determining that there are other galaxies in the Universe beyond the Milky Way, and for observing that the universe is expanding at a constant rate. Hubble was a ...

If our 13.8 billion-year-old cosmos could be considered middle-aged, researchers note these new images captured around its ...

PBS Kids will also introduce an interactive game set in this universe. Titled "Groovin' with Acoustic Rooster," the game will ...