String theory says 10 500, but new calculations suggest the real number is so high the human brain could never distinguish between them alldoi:10.1016/S0262-4079(09)62849-9GefterAmandaNew ScientistAndrei Linde and Vitaly Vanchurin. How many universes are in the multiverse? 2009....
The story of physics has been one of an ever-expanding understanding of the sheer scale of reality, to the point where physicists are now postulating that there may be far more universes than just our own. Chris Anderson explores the thrilling implic...
The story of physics has been one of an ever-expanding understanding of the sheer scale of reality, to the point where physicists are now postulating that there may be far more universes than just our own. Chris Anderson explores the thrilling implications of this idea....
By the 1920s, scientists like Edwin Hubble were cataloging thousands of "island universes" and recording information about their sizes, rotations and distances from Earth. One key aspect astronomers hoped to measure was the mass of a galaxy. But you can't just weigh something the size of a ...
We argue that the total number of distinguishable locally Friedmann "universes" generated by eternal inflation is proportional to the exponent of the entropy of inflationary perturbations and is limited by ee3N, where N is the number of e-folds of slow-roll posteternal inflation. For simplest...
TEDed0004-2012-03-12 How Containerization Shaped the Modern World[双语] 04:47 TEDed0005-2012-03-12 How many universes are there - Chris Anderson[双语] 04:43 TEDed0006-2012-03-12 How pandemics spread[双语] 08:00 TEDed0007-2012-03-12 Introducing TED-Ed - Lessons Worth Sharing[双语...
How do you think the Universe is going to end? What is the Universe - space or matter? How many dimensions are needed to describe the universe? How did the mass of the universe come into being? If the universe is ever-expanding, couldn't there be multiple universes expanding into each ...
Astronomers as far back as the mid-18th century had speculated that some nebulae might be remote systems of stars or “island universes,” but there wasno data to support this hypothesis. Island universes referred to the idea that there could be enormous stellar systems outside the Milky Way ...
She added: “Two disk galaxies smashing together caused gas – the fuel from which stars are formed – to sink towards their center, generating trillions of new stars. “These cosmic collisions happened some eight to 12 billion years ago, when the universe was in a much more active phase of...
Galaxiesare vast collections of stars that populateour universe. But how many galaxies are there? Counting them seems like an impossible task. Sheer numbers is one problem — once the count gets into the billions, it takes a while to do the addition. Another problem is the limitation of our...