Is dark matter real?

Jim McDonald
Jim McDonald
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I was working at Kennedy

I was working at Kennedy Space Center when the astronauts died in the capsule. They played the audio recording from the capsule over the announcement system throughout the center. An awful thing to do.

Mike Hewson
Mike Hewson
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RE: I was working at

Message 38393 in response to message 38392

Quote:
I was working at Kennedy Space Center when the astronauts died in the capsule. They played the audio recording from the capsule over the announcement system throughout the center. An awful thing to do.


Really? Awww ..... shute!!
This is in '67 right?

Fine men.

A particularly cruel & ironic end for Gus Grissom after the Liberty Bell fiasco.
A classic example of the results when the users don't/can't input to the design.

For shame ..... :-(

Cheers, Mike.

NB. It's wasn't only the pure O2, but also the fact of it's overpressure + inward opening hatch .... ( plus, as Frank Borman pointed out, not imagining the possible effect of that combination )

( edit ) Dark matter/energy should be seen not so much as 'truth' but a signal that our understanding of the cosmos lacks quite a bit. These concepts are labels representing gaps ( biggies!!! ) in our knowledge of the cosmos. View them as 'work in progress' signs! :-)

I have made this letter longer than usual because I lack the time to make it shorter. Blaise Pascal

gravitonring
gravitonring
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ouch! Jim McDonald, sorry to

Message 38394 in response to message 38393

ouch! Jim McDonald, sorry to conjure up painful memories!

in spite of the past, i accept NASA's proof of dark matter without looking at it myself, i would not know the difference either way...

all those books for dummies on any subject were made for me :)

there is no such thing as NASA, there are just people, Murphy's Law, and the certainty that Maxwell Smart's 'old wooden shoe trick' will happen...

paranoia is a survival skill...

the failure of bona fide scientific and medical research to decode human behavior allows 100 million criminally insane people to go untreated...

do the math...it solves Iran in the 1970s, Iraq today, and ALL of WWII...

everything is true, the opposite of everything is also true

gravitonring
gravitonring
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as soon as i invent my

Message 38395 in response to message 38394

as soon as i invent my graviton flashlight, dark matter will be history :)

maxwell smart: wooden shoe: sabotage

http://en.wikipedia.org/wiki/Get_Smart

maybe it was Inspector Gadget? or Inspector Clouseau

everything is true, the opposite of everything is also true

gravitonring
gravitonring
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pictures of dark matter vs

Message 38396 in response to message 38395

pictures of dark matter vs not dark matter :)

now this even i can understand...

http://astro.berkeley.edu/~mwhite/darkmatter/dm.html

http://cosmology.berkeley.edu/sem_bcg_future.html

Quote:


January 2007:
Jan. 16 Tuesday 12:30 pm
Anja von der Linden, Garching
544 Campbell Hall (also videoconferenced to LBL 50-5131)
tba

Jan. 16 Tuesday 2 pm at LBL
Alexie Leauthaud, Marseille
50A-5132, LBL
"The Link Between Galaxies and their Dark Matter Haloes"
To what extent does the surrounding dark matter environment shape the observational properties of luminous galaxies? In an attempt to shed further light on this question, I will present early results from a lensing analysis undertaken in the COSMOS field (Scoville et al. 2006). Weak gravitational lensing techniques have the unique ability to probe the full dark matter distribution and to reveal how galaxies are related to their dark matter haloes. Using the galaxy-galaxy lensing technique, I have mapped dark matter around an ensemble of galaxies and groups of galaxies within the COSMOS field. Using the exqusite ACS imaging to classify galaxies according to their morphology, I will show that the dark matter environment does indeed play a role in shaping the galaxies that we observe. Measuring this connection is not only a powerful test of the CDM paradigm, but also provides an essential ingredient towards understanding the physics of galaxy formation.

previous powerpoint available:

Nov. 13, Monday 12:10 pm (TAC seminar)
Glennys Farrar, NYU
544 Campbell Hall (also videoconferenced to LBL 50-5131)
"A new force in the Dark Sector?"
The dynamics of dark matter is studied using the massive cluster of galaxies 1E0657-56. The velocity of the ``bullet" subcluster has been measured by X-ray emission from the shock front, and the masses and separation of the main and sub-clusters have been measured by gravitational lensing. The velocity with gravity alone is calculated in a variety of models of the initial conditions, mass distribution and accretion history; it is much higher than expected, by at least 2.4 sigma. The probability of so large a subcluster velocity in cosmological simulations is, following Hayashi and White, < 10^{-7}. A long range force with strength ~ 0.4 - 0.8 times that of gravity would provide the needed additional acceleration.

everything is true, the opposite of everything is also true

gravitonring
gravitonring
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web exclusive: there is no

Message 38397 in response to message 38396

web exclusive: there is no dark matter?

http://www.discover.com/web-exclusives/mond-dark-matter-dialogue/

http://www.discover.com/issues/aug-06/cover/

everything is true, the opposite of everything is also true

tullio
tullio
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The NYTimes reports some new

The NYTimes reports some new results coming from Hubble. I cannot link because a registration is required (at no cost). Viva Hubble!
Tullio

gravitonring
gravitonring
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http://www.universetoday.com/

http://www.universetoday.com/2006/04/11/podcast-dark-energy-stars/

please forgive any impression that i might have given about NASA...

i support NASA in every way, i just hate my inability to protect people...

some of my NASA heroes:

http://www.universetoday.com/2005/06/30/podcast-interview-with-story-musgrave/

http://www.noetic.org/about/history.cfm

http://www.nasa.gov/astronauts/index.html

everything is true, the opposite of everything is also true

gravitonring
gravitonring
Joined: 19 Oct 06
Posts: 170
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RE: http://www.universetoda

Message 38401 in response to message 38400

Quote:

http://www.universetoday.com/2006/04/11/podcast-dark-energy-stars/

please forgive any impression that i might have given about NASA...

i support NASA in every way, i just hate my inability to protect people...

some of my NASA heroes:

http://www.universetoday.com/2005/06/30/podcast-interview-with-story-musgrave/

http://www.noetic.org/about/history.cfm

http://www.nasa.gov/astronauts/index.html

i personally met John Glenn and was too scared to speak to him :)
i was with a group of friends and we did not all want to approach him;
one of my friends did go and talk with him, and Glenn was great!

everything is true, the opposite of everything is also true

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