expansion
Maybe We Don’t See Aliens Because Nobody Wants to Come Here
The Fermi Paradox won't go away. It's one of our most compelling thought experiments, and generations of scientists keep wrestling…
What Was Cosmic Inflation? The Quest to Understand the Earliest Universe
The Big Bang was a tremendous theory, but it had a few problems. In 1980 Alan Guth developed the revolutionary…
Astronomy Cast Ep. 402: Gravity Eyes: See The Invisible With The Force
What kinds of things can we see using gravity, that we may not otherwise be able to see? Pamela will…
How Are Galaxies Moving Away Faster Than Light?
So, how can galaxies be traveling faster than the speed of light when nothing can travel faster than light? I’m…
Is the Universe Dying?
Is our 13.8 billion year old universe actually in its death throes? Poor Universe, its demise announced right in it’s…
Will the Big Bang Go Backwards?
Will the Big Bang expansion eventually come to a stop over the course of infinite time and ultimately pull everything…
How Can Space Travel Faster Than The Speed Of Light?
Cosmologists are intellectual time travelers. Looking back over billions of years, these scientists are able to trace the evolution of…
Where Did the Big Bang Happen?
Imagine the Big Bang, and you're imagining an explosion. There must be come place we could travel in the Universe…
How Fast is the Universe Expanding?
The Universe is expanding, but how quickly is it expanding? How far away is everything getting from everything else? And…
Is Everything Actually Shrinking?
Whoa, here's something to think about. Maybe the Universe isn't expanding at all. Maybe everything is actually just shrinking, so…