Einstein
What Shape is the Universe?
It's a reasonable question to wonder what the shape of the Universe is. Is it a sphere? A torus? Is…
Astronomy Cast Ep. 371: The Eddington Eclipse Experiment
At the turn of the 20th Century, Einstein's theory of relativity stunned the physics world, but the experimental evidence needed…
Astronomy Cast Ep. 370: The Kaufmann–Bucherer–Neumann Experiments
One of the most amazing implications of Einstein's relativity is the fact that the inertial mass of an object depends…
How Do We Know Dark Energy Exists?
We have no idea what it dark energy is, so how are we pretty sure it exists? I've talked about…
How We’ve ‘Morphed’ From “Starry Night” to Planck’s View of the BICEP2 Field
From the vantage point of a window in an insane asylum, Vincent van Gogh painted one of the most noted…
How are Energy and Matter the Same?
As Einstein showed us, light and matter and just aspects of the same thing. Matter is just frozen light. And…
What Time is It in the Universe?
Check your watch, what time is it? But wait, you've actually been moving and accelerating, and according to Einstein, everything's…
Does Light Experience Time?
Have you ever noticed that time flies when you're having fun? Well, not for light. In fact, photons don't experience…
Astronomy Cast Ep. 335: Photoelectric Effect
Pop quiz. How did Einstein win his Nobel prize? Was it for relativity? Nope, Einstein won the Nobel Prize in…
Why Einstein Will Never Be Wrong
One of the benefits of being an astrophysicist is your weekly email from someone who claims to have “proven Einstein…