A Journey to the End of the Universe

What will happen to us in the next few hundred years? Or a thousand? How will the Universe end? How the heck should I know? Hey, nobody knows for sure, but we can gather all the existing theories together and find it out. Good thing we’ve got this time projector here to check it out […]

Science, Religion, and the Big Bang

Physicists used to think that the universe had existed forever, unchangingly, because that’s what their observations of the night sky suggested. Needless to say, this view clashed with the “origin” or “creation” stories of most major religions, which hold that the universe had a beginning. So it’s not surprising that it was a Catholic priest, […]

The science of expansion: Andromeda, gravity, and the ‘Big Rip’ | Michelle Thaller

One of the questions I get asked most commonly as an astronomer is if almost all the galaxies in the universe are flying away from us in space, why is the Andromeda Galaxy getting closer to us? Does that somehow mean that the Big Bang works differently in different parts of the universe? And the […]

A Polarizing Discovery About the Big Bang!

Light is a wave, and as it travels it does its “waving” along a certain direction – its polarization. Polarization, among other things, heavily influences the way light bounces and scatters – that’s why horizontally polarized light reflects off of a lake or car windshield, which in turn is why sunglasses with a vertical polarizing […]

Wormholes Explained – Breaking Spacetime

If you saw a wormhole in reality, it would appear round, spherical, a bit like a black hole. Light from the other side passes through and gives you a window to a faraway place. Once crossed, the other side comes fully into view with your old home now receding into that shimmering spherical window. But […]

How Far Can We Go? Limits of Humanity.

Is there a border we will never cross? Are there places we will never reach, no matter how hard we try? Turns out there are. Even with science fiction technology, we are trapped in our pocket of the Universe. How can that be? And, how far can we go? We live in a quiet arm […]

Three Ways to Destroy the Universe

One day the universe will die. But why? And how? And will the universe be dead forever? And how do we know that? First of all, the universe is expanding. And not only that, the rate of its expansion is accelerating. The reason: dark energy. Dark energy is a strange phenomenon that scientists believe permeates […]

The True Science of Parallel Universes

Everyone loves the idea of parallel universes – maybe it’s the appeal of an ideal world where you have second chances and things turn out differently – an alternate reality where you do get into Hogwarts and the Star Wars prequels aren’t made and you finally plug in your asymmetric computer cord correctly on the […]

The Beginning of Everything — The Big Bang

The beginning of everything. The Big Bang. The idea that the universe was suddenly born and is not infinite. Up to the middle of the 20th century, most scientists thought of the universe as infinite and ageless. Until Einstein’s theory of relativity gave us a better understanding of gravity, and Edwin Hubble discovered that galaxies […]