“If I have ever made any valuable discoveries, it has been due more to patient attention, than to any other talent.” –Isaac Newton Born the year Galileo died, Isaac Newton is one of the most revered figures in all of physics. In addition to the work he did on optics, planetary motion and gravitation, Newton … Read moreWhat Newton’s 3 Laws Can Teach You
“What do we mean by setting a man free? You cannot free a man who dwells in a desert and is an unfeeling brute. There is no liberty except the liberty of some one making his way towards something. Such a man can be set free if you will teach him the meaning of thirst, … Read moreThe Telescope’s Best Friend? Gravity!
“The size of the universe is no more depressing than the size of a cow.” –David Deutsch But it is bizarre, I’ll give you that. The most common scientific question I get asked is how, if the Universe is 13.7 billion years old, and the speed limit of the Universe is the speed of light, … Read moreQ & A: How is the Universe so big, given its age?
“You can’t have a light without a dark to stick it in.” –Arlo Guthrie You know the story. Every galaxy we look out at, with hardly any exceptions, appears to be moving away from us. Not only that, but the farther away a galaxy appears to be, the faster it appears to move away from … Read moreBig Bang Alternatives: Could my light just get tired?
“We have been forced to admit for the first time in history not only the possibility but the fact of the growth and decay of the elements of matter. With radium and with uranium we do not see anything but the decay. And yet, somewhere, somehow, it is almost certain that these elements must be … Read moreParticle Physics + Relativity makes the impossible happen!
“The whole fabric of the space-time continuum is not merely curved, it is in fact totally bent.” –Douglas Adams As many of you know, if you take a whole bunch of mass, and you’ve got nothing going on except gravity, it’s going to gravitationally collapse. And if atoms, nuclei, pressure, and nuclear reactions don’t (or … Read moreThere’s a hole in my spacetime! Or a string, or a wall…
“The only problem with the speed of light, is it gets here too early in the morning.” –Danny Nevrath One of the most common questions I get asked is whether gravity is instantaneous, or whether there’s a speed limit to how fast the force of gravity can travel. It’s a good question! After all, we … Read moreWhat is the Speed of Gravity?
“I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.” –Galileo Galilei Geez, Ethan, why don’t you take on a bigger question? This question of “fundamental things” has a special meaning to scientists and natural philosophers, going all … Read moreWhat’s the Most Fundamental Thing in the Universe?