Cosmology
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Have We Found The Universe That Existed Before The Big Bang?
Click To Enlarge The current cosmological consensus is that the universe began 13.7 billion years ago with the Big Bang. But a legendary physicist says he's found the first evidence of an eternal, cyclic cosmos. The Big Bang model holds that everything that now comprises the universe was once concentrated in a single point of near-infinite density. Before this singularity exploded and the universe began, there was absolutely nothing - indeed, it's not clear whether one can even use the term "before" in reference to a pre-Big-Bang cosmos, as time itself may not have existed yet. In the current model, the universe began with the Big Bang, underwent cosmic inflation for a fraction of a second, then settled into the much more gradual expansion that is still going on, and likely will end with the universe as an infinitely expanded, featureless cosmos.
Einstein for Everyone Nullarbor Press 2007 revisions 2008, 2010, 2011, 2012, 2013 Copyright 2007, 2008, 2010, 2011, 2012 John D.
Einstein for Everyone
The world's largest particle accelerator, the Large Hadron Collider, has set a new world record for colliding two beams of more particles together than ever before. The Large Hadron Collider (LHC) at the CERN physics lab in Geneva, Switzerland, has been operating since 2009, slowly ramping up its power levels and the intensity of its particle beams. Beam intensity is measured in luminosity, which corresponds to how many particles — in this case protons — are packed into each beam.
Gigantic Swiss atom smasher breaks world record
Pale Blue Dot « a simple prop
It’s the twentieth anniversary of the famous “ pale blue dot ” photo – Earth as seen from Voyager 1 while on the edge of our solar system (approximately 3,762,136,324 miles from home). Sagan’s words are always worth remembering: Look again at that dot. That’s here. That’s home. That’s us.