return to list of latest ideas

Single Idea 21109

[catalogued under 27. Natural Reality / D. Activity of Matter / 6. Special Relativity]

Full Idea

Special Relativity says nothing can travel 'through space' faster than the speed of light. But space itself can do whatever the heck it wants, at least in general relativity. And it can carry distant objects apart from one another at superluminal speeds

Gist of Idea

Space itself can expand (and separate its contents) at faster than light speeds


Lawrence M. Krauss (A Universe from Nothing [2012], 06)

A Reaction

Another of my misunderstandings corrected. I assumed that the event horizon (limit of observability) was defined by the stuff retreating at (max) light speed. But beyond that it retreats even faster! What about the photons in space?

Book Reference

Krauss,Lawrence M.: 'A Universe from Nothing' [Simon and Schuster 2012], p.96