Cosmology is timeless, perhaps literally—as this post argued on January 23, 2015. In the 1992 documentary A Brief History of Time, Stephen Hawking describes what we would see if we were observing an astronaut nearing a black hole’s event horizon—the barrier beyond which gravitation is so great that not even light can escape. He invites […]
black holes
Yesterday the Royal Swedish Academy announced that the 2017 Nobel Prize in Physics would recognize the discovery of gravitational waves; the recipients would be Barry Barish, Kip Thorne, and Rainer Weiss, three of the visionaries who shepherded the Laser Interferometer Gravitational-Wave Observatory (LIGO) through four decades of technological and bureaucratic innovations. (Another founder of the […]
If you haven’t seen the movie Interstellar, you might not recognize the image above. It’s the black hole that figures prominently in the climax. But even if you have seen the movie, chances are excellent you still don’t know what you’re looking at. I didn’t, anyway, at least the first few days I spent staring at […]
Physicists, like the ancient Greeks, like to gossip about their gods. A few days ago, three physicists* were talking on Twitter** about a review by a fourth physicist, Freeman Dyson, of a biography of one of these gods, J. Robert Oppenheimer, and about his war with another one, John Archibald Wheeler. Physicist #1: Oppenheimer did […]
Time again to reach into the “Ask Mr. Cosmology” mailbag and see what readers want to know about . . . The Wonders of the Universe! First up, some questions from the comments portion of the previous installment of “Ask Mr. Cosmology.” Q: Is protest against God morally acceptable? Mr. Cosmology: Unlike Richard, Mr. Cosmology knows better than to venture into […]
“Did they ever meet?” I got the question all the time. People would ask what I was working on, and I would say a book about Einstein and Freud, and then would come the question. Same thing with my next book. People would ask what I was working on, and I would say a book […]
The best thing that ever happened to the Big Bang is its name. For scientists, the acceptance of a scientific concept depends on its explanation of existing data, its prediction of observable phenomena, the observation of those phenomena, and the duplication of those results. But for non-scientists—well, for scientists, too—the popularity of a concept can come […]
Scattered around the periphery of our galaxy, the Milky Way, are upwards of 150 odd creatures called globular clusters. They’re little agglomerations of stars that are bound by gravity into a sphere and that inside it, are buzzing around like flies. They’re odd because 1) most stars come in singles or pairs, and globulars have […]