big bang

Category archives for big bang

“When you see how fragile and delicate life can be, all else fades into the background.” –Jenna Morasca The hot Big Bang — proposed seventy years ago — is a tremendous success story. Predicated on the assumption that the Universe was hotter, denser, more uniform and expanding faster in the past, it’s allowed us to…

When it comes to the Universe, physicists say things like: it originated in a Big Bang, it’s isotropic (or the same in all directions), and it’s homogeneous (the same everywhere), save for the effects of cosmic evolution. In every direction we look, we see galaxies expanding away from us, with the expansion rate increasing the…

“The slow philosophy is not about doing everything in tortoise mode. It’s less about the speed and more about investing the right amount of time and attention in the problem so you solve it.” –Carl Honore If you wanted to know how fast you were moving through space, you’d need to measure it all: the…

“The total number of people who understand relativistic time, even after eighty years since the advent of special relativity, is still much smaller than the number of people who believe in horoscopes.” –Yuval Ne’eman It’s been 13.8 billion years since the Big Bang for us, and when we look out at a distant object in…

“Despite its name, the big bang theory is not really a theory of a bang at all. It is really only a theory of the aftermath of a bang.” –Alan Guth If we trace the evolution of our Universe back in time, we can arrive at a time before there were organic molecules, rocky planets,…

“The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to -271.3°C, not much good for defrosting the pizza, let alone cooking it.” –Stephen Hawking Imagine you traveled out into empty space. Away from any and all…

“It’s hard to build models of inflation that don’t lead to a multiverse. It’s not impossible, so I think there’s still certainly research that needs to be done. But most models of inflation do lead to a multiverse, and evidence for inflation will be pushing us in the direction of taking [the idea of a]…

“Were the succession of stars endless, then the background of the sky would present us a uniform luminosity, like that displayed by the Galaxy-since there could be absolutely no point, in all that background, at which would not exist a star.” -Edgar Allan Poe The master of the macabre, little known to most, was actually…

“Revolutions are something you see only in retrospect.” –Alan Greenspan If there’s one thing you can be certain of when it comes to the fundamental, scientific truths of our Universe, it’s this: someday, in the not too distant future, those truths will be superseded by more fundamental ones. And even those, quite likely, won’t be…

“For my part I know nothing with any certainty, but the sight of the stars makes me dream.” –Vincent Van Gogh When we look out into the Universe, farther back to greater distances, we’re also looking back in time, farther and farther into the past. If we could look back far enough, close enough to…