Physics

Category archives for Physics

“By preventing dangerous asteroid strikes, we can save millions of people, or even our entire species. And, as human beings, we can take responsibility for preserving this amazing evolutionary experiment of which we and all life on Earth are a part.” -Rusty Schweickart Asteroid strikes are among the most destructive natural disasters to ever impact…

“What we observe is not nature itself, but nature exposed to our method of questioning.” -Werner Heisenberg Empty space, according to quantum mechanics, isn’t exactly empty. Take away all the matter, radiation and anything else you can have populating your space, and you’ll still have some amount of energy in there: the zero-point energy of…

Ask Ethan: What Is Spacetime? (Synopsis)

“‘Space-time’ – that hideous hybrid whose very hyphen looks phoney.” -Vladimir Nabokov Sure, you know what space and time are. If you heard of Einstein and relativity, you might know that they’re not absolute quantities, but that how you experience distances and the ticking of clocks is dependent on your motion through the Universe. But…

“The way to love anything is to realize that it might be lost.” -G. K. Chesterton Worried about the environment of Earth today? Here’s a sobering fact: we already know how it’s all going to end. Not just when the next ice age will come or the next supervolcano will blow, but on cosmic scales…

“Work gives you meaning and purpose and life is empty without it.” -Stephen Hawking Throw a book into a black hole, and the information must somehow wind up inside. Same goes for a star, a planet, or even a single proton: that information must be maintained. But allow enough time to pass, and quantum theory…

“I hope that in this year to come, you make mistakes. Because if you are making mistakes, then you are making new things, trying new things, learning, living, pushing yourself, changing yourself, changing your world. You’re doing things you’ve never done before, and more importantly, you’re doing something.” -Neil Gaiman Here we are, at the…

“It was a strange lightness, a drifting feeling. Zero gravity. I understood that everything that once seemed solid and immovable might just float away.” -Lisa Unger If you want to experience zero gravity, all you need to do is go to space, turn your rocket off and feel that weightless sensation, right? Except, from up…

“There are now dozens of hockey sticks and the all come to the same basic conclusion. The recent warming does appear to be unprecedented as far bas as we can go. But even if we didn’t have that evidence, we would still know that humans are warming the planet, changing the climate and that represents…

“Men go abroad to wonder at the heights of mountains, at the huge waves of the sea, at the long courses of the rivers, at the vast compass of the ocean, at the circular motions of the stars, and they pass by themselves without wondering.” -Saint Augustine Well, another week has gone by — the…

“Lives are snowflakes – unique in detail, forming patterns we have seen before, but as like one another as peas in a pod (and have you ever looked at peas in a pod? I mean, really looked at them? There’s not a chance you’d mistake one for another, after a minute’s close inspection.)” -Neil Gaiman…