This has changed our vision of the future, which is now far bleaker. The longer we wait, the less of the universe we will be able to see. In hundreds of billions of years astronomers on some distant planet circling a distant star (Earth and our sun will be long gone) will observe the cosmos and find it much like our flawed vision at the turn of the last century: a single galaxy immersed in a seemingly endless dark, empty, static universe.The fringes of science are beyond my comprehension. It's a lot simpler to imagine an old guy with a beard making everything himself. Now why He would do it, and why He would do it the way we find it, those are questions that are fun to consider. That line about God making man in His image really is a head scratcher when you have a day composed of dealing with assholes. Theodicy is a rational line of questioning on some days. Of course, the Universe forming out of nothing and having no purpose explains away the problem of evil. With no Big Guy directing things, it's easy to see why there's cancer and childhood disease and dementia and tornadoes and on and on. Pass me a beer.
Out of this radically new image of the universe at large scale have also come new ideas about physics at a small scale. The Large Hadron Collider has given tantalizing hints that the origin of mass, and therefore of all that we can see, is a kind of cosmic accident. Experiments in the collider bolster evidence of the existence of the "Higgs field," which apparently just happened to form throughout space in our universe; it is only because all elementary particles interact with this field that they have the mass we observe today.
Most surprising of all, combining the ideas of general relativity and quantum mechanics, we can understand how it is possible that the entire universe, matter, radiation and even space itself could arise spontaneously out of nothing, without explicit divine intervention. Quantum mechanics' Heisenberg uncertainty principle expands what can possibly occur undetected in otherwise empty space. If gravity too is governed by quantum mechanics, then even whole new universes can spontaneously appear and disappear, which means our own universe may not be unique but instead part of a "multiverse."
As particle physics revolutionizes the concepts of "something" (elementary particles and the forces that bind them) and "nothing" (the dynamics of empty space or even the absence of space), the famous question, "Why is there something rather than nothing?" is also revolutionized. Even the very laws of physics we depend on may be a cosmic accident, with different laws in different universes, which further alters how we might connect something with nothing. Asking why we live in a universe of something rather than nothing may be no more meaningful than asking why some flowers are red and others blue.
Tuesday, April 10, 2012
The More We Learn, The Less We Understand
Cosmologist Lawrence Krauss ponders lessons from the study of the universe:
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment