Comments on: Digging Up the Early Universe

By: Cynthia

Cynthia — Tue, 09 Oct 2012 01:39:16 +0000

Sean–
Hubby and I just finished last DVD of your Learning Co. lessons on dark matter and dark energy. Since we graduated from college in late 60′s (chem. & phys.) things have changed a whole lot. Enjoyed the DVDs and learned a lot and got confused a lot. If you’re ever in W. NY for a talk at U of Buffalo, we’ll come see what’s changed since your DVDs were made. We’re also doing research on internet on newer discoveries and ordered your two books to read. Go for it, Sean!

By: martenvandijk

martenvandijk — Mon, 08 Oct 2012 12:42:30 +0000

In reaction to what Paul Brown has said about evolution and Big Bang, I like to mention that evolution is a hell of an idea, but as far as Big Bang is concerned, to hell with it!

By: James Goetz

James Goetz — Fri, 05 Oct 2012 04:00:28 +0000

“Of course we literally look back in time every time we peer into a telescope, since it takes time for light to travel to us from distant objects. ”

Not only that, we look back in time every time we peer into a mirror….

By: Cosmonut

Cosmonut — Thu, 04 Oct 2012 09:19:47 +0000

Must say this kind of thing makes me feel quite disappointed with the Universe.

I mean all those vast endless spaces and billions of galaxies, and it only takes a group of jumped up apes sitting in a tiny corner a few hundred years to figure it all out.
C’mon there’s GOT to be more to it !!

By: Uncle Al

Uncle Al — Wed, 03 Oct 2012 19:00:34 +0000

Given a universe filled with high density hot H + He plasma slowly cooling by adiabatic expansion, will it super-radiantly lase proximate in time to recombination? Deeply red-shifted, narrow bandwith sparkles would be telling.

By: Marshall Eubanks

Marshall Eubanks — Wed, 03 Oct 2012 16:44:54 +0000

If Dark Matter is really strange matter, i.e., if it is made up of quark nuggets or compact composite objects (CCOs), then there should be bits of the QCD phase transition at the time of baryogenesis floating around where we can detect them, which would mean we could study objects formed when the universe was roughly 5 microseconds old. (In the CCO idea the objects are massive enough that they don’t interact much because of their low numbers, not because of a very low cross section, so you don’t need WIMPs.)

See http://arxiv.org/abs/astro-ph/0603064 for more about this fascinating idea. Zhitnitsky prefers a CCO mass of about 1000 tons; if all of the Dark Matter is made of this stuff at that mass then one such object should pass through the Earth roughly every 3 years, and could potentially be detected via seismology.

By: Shantanu

Shantanu — Wed, 03 Oct 2012 12:44:22 +0000

Sean, pardon my off-topic comment here , but I didn’t see any mention of Leonid Grishchuk passing away (about 3 weeks ago) on this blog, inspite of the fact that almost all CV authors are cosmologists.
Anyhow just wanted to share this sad news(in case anyone was not aware of it.)

By: Rahul

Rahul — Wed, 03 Oct 2012 10:59:20 +0000

My mistake, the question about fusion has been answered via a link in the main article. I should read first! However, I would be grateful for answers to my other questions or links to help my understanding.

By: martenvandijk

martenvandijk — Wed, 03 Oct 2012 08:57:12 +0000

I advise the physics community to hire forensic scientists to do the digging and the research on the ”remains”. They might discover a terrible secret.

By: Zathras

Zathras — Tue, 02 Oct 2012 20:31:57 +0000

@5 Rohan:
Then would the complementary anti-matter version be called….doesnt matter?