Why do we Need Dark Energy to Explain the Observable Universe?
Posted on September 27, 2009 Comments (2)
An accelerating wave of expansion following the Big Bang could push what later became matter out across the universe, spreading galaxies farther apart the more distant they got from the wave’s center. If this did happen, it would account for the fact that supernovae were dim- they were in fact shoved far away at the very beginning of the universe. But this would’ve been an isolated event, not a constant accelerating force. Their explanation of the 1998 observations does away with the need for dark energy.
And Smoller and Temple say that once they have worked out a further version of their solutions, they should have a testable prediction that they can use to see if the theory fits observations.
Another interesting example of the scientific inquiry process at work in cosmology.
Shouldn’t the National Academy of Science (NAS), a congressionally chartered institution, promote open science instead of erecting pay walls to block papers from open access? The paper (by 2 public school professors) is not freely available online. It seems like it will be available 6 months after publication (which is good) but shouldn’t the NAS do better? Delayed open access, for organizations with a focus other than promoting science (journal companies etc.), is acceptable at the current time, but the NAS should do better to promote science, I think.