Black Hole Fragmentation
Image Credit: Burkhard Zink, Nikolaos Stergioulas, Ian Hawke, Christian D. Ott, Erik Schnetter, and Ewald Muller
Posts tagged with cosmology
At the local viewing of the transit of Venus, I asked an astronomer named Lisa how people noticed a planet going in front of the Sun in the first place. (Surely they weren’t just staring at the sun all day?)
She told me:
I always told this story to myself as the gradual removal of anthropocentrism from the natural order. First we learn we’re not the centre of the Universe, then we’re not the only Galaxy, we’re not the only species that falls in love, we’re evolved by chance like everyone else, and so on. But that story is wrong. It doesn’t fit this bit of the history of ideas and I bet it doesn’t fit other bits of history either. I need a new story.
Lawrence Krauss, author of A Universe from Nothing lecturing on cosmology.
exp(−x)integrals.) Therefore your mass is 90% due to quantum fluctuations around the zero point energy.
If you put your hand up in the night, away from L.A., and look at a dark spot of the sky the size of a dime—with a large enough telescope, you could see 100,000 galaxies there.
Stars explode once every 100 years per galaxy. So in that little region with 100,000 galaxies, on a given night you’ll see ten stars explode.
The universe is huge, and old, and rare things happen all the time.
Without science, explaining why there is something rather than nothing requires explaining every leaf, rock, beetle and star.
Cosmology and evolutionary theory pare the explanation requirement down … we might have to explain only a physical law or three, and everything else … can follow naturally. … [I]t might be that we don’t have to explain why there is matter and energy, perhaps not even why there is three-dimensional space and time or why physical constants have the values they have.
It is also possible, although harder to conceive, that we could explain everything down to nothing: no physical laws, only logic. Putting that another way, it might be that naive mental pictures of nothing are logically impossible.
Aaron C. Brown, reviewing Why There is Something Rather than Nothing by Lawrence Krauss