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The dark "unknown" matter....

From: Sheela Belur (bvsheela_at_yahoo.com)
Date: Mon Sep 10 2001 - 08:01:39 PDT

Here is an extract from an interesting press release from NASA
Chandra observatory that talks about the dark "unknown" matter that
forms the universe...

Our Alwars referred to this "unknown dark" matter as "Kannan enrum
karun deivam" or "kAr mugil vaNNan" long long time ago.....!


-----------------------------------------------

Megan Watzke
Chandra X-ray Observatory Center, CFA, Cambridge, Mass.
(Phone: 617/496-7998)

RELEASE: 01-180

CHANDRA PROBES NATURE OF DARK MATTER

     Astronomers have shed new light on dark matter, the
invisible and unknown material that comprises most of the
Universe.

Using NASA's Chandra X-ray Observatory, scientists have
precisely determined the distribution of dark matter in a
distant galaxy cluster. These new measurements serve to
narrow the field of candidates that explain this puzzling
element.

John Arabadjis and Mark Bautz of the Massachusetts Institute
of Technology (MIT) in Cambridge, Mass., and Gordon Garmire
of Pennsylvania State University (Penn State) in University
Park, announced their results today at the "Two Years of
Science with Chandra" symposium in Washington. Their
observations enabled them to trace the distribution of dark
matter in the galaxy cluster EMSS 1358+6245.

Previous evidence from radio, optical and X-ray observations
convinced astronomers that most of the matter in the universe
is in some dark, as yet undetected, form that makes its
presence felt only through gravity. "The new Chandra
observations are providing new clues about the nature of this
mysterious stuff,'' said Bautz.

..................

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