Re: This Week's Finds in Mathematical Physics (Week 238)

Timothy Murphy wrote:
John Baez wrote:

5) Eric Hayashi and Simon D. M. White, How rare is the bullet cluster?,
Mon. Not. Roy. Astron. Soc. Lett. 370 (2006), L38-L41, available as
astro-ph/0604443.

So, dark matter is seeming more and more real. In fact, last year
folks found evidence for "ghost galaxies" made mainly of dark matter
and cold hydrogen, with very few stars:

This is probably a very ignorant remark,
but I thought the latest theory was that "dark matter" was not actually matter,
but was accounted for by the re-habilitation of the constant
in Einstein's equation?

Or was that last week's theory?



Dark Energy--Not Dark Matter.
.