What the heck is energy?
Electricity, fuels, heating: energy is all around us. Physicists talk about it all the time to decode the mechanisms behind basically every process. Yet a good definition of energy is hard to come by: what is this “energy”?
Tag: Gravity
All physics is wrong!
… a little bit, it always has been and probably always will be. But it’s part of the process. Continue reading All physics is wrong!
Two equations are enough to go to the Moon
All the physics you need to go to the Moon is taught in schools. And was published by some dude whose birthday is coming up. Continue reading Two equations are enough to go to the Moon
The relativity experiment you hold every day
We’re proving Einstein right all the time. With our phones. Continue reading The relativity experiment you hold every day
Why galaxies are flat (and Earth isn’t)
A tale of gravity making things round, but in different ways. Continue reading Why galaxies are flat (and Earth isn’t)
Four fundamental things about gravitational waves
The team at LIGO (the Laser Interferometry Gravitational-wave Observatory) annouced they directly measured the gravitational waves emitted by two black holes merging into one. What are they talking about? Here’s the answer to 4 of the most common questions (plus 2 extra-credit, if you feel up to it). What are gravitational waves? Gravitational waves are ripples in space-time predicted by Einstein’s General Relativity theory. If … Continue reading Four fundamental things about gravitational waves
Mercurial sunset
Nothing’s more naturally predictable than the progression of a day, right? The Sun comes up in the East, rises through the sky, then sets in the West. That’s part of the fascination of places where it isn’t quite so. However, one of the places with the craziest days is rather unaccessible: Mercury. It’s the closest planet to the Sun, so it feels the star’s gravitational … Continue reading Mercurial sunset
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