NOVA scienceNOW | The Dark Matter Mystery | PBS

http://www.pbs.org/nova/sciencenow We can't see dark matter, and some skeptics doubt its existence, but many scientists think it makes up 20-some percent of our universe. Astronomer Doug Clowe explains how the Bullet Cluster, a group of galaxies billions of light years away, may shed some light on this mysterious stuff.
Don't miss the new season of NOVA scienceNOW, airing every Wednesday at 9pm starting June 25 on PBS. Watch past episodes of the program, try out interactives, and more on our Web site: http://www.pbs.org/nova/sciencenow

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Tags for this video: astronomy astrophysic Bullet Clowe Cluster cosmic dark Doug galaxy matter NOVA PBS Science

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Palmbeatzstudio, ... ( 2 years ago by issak)

Palmbeatzstudio, Dark matter can be said to be the by product of a faulty theory. Sheer non sense and an inability to be able to say we just don't know. Years from now future scientists will chuckle at just how primitive and unimaginative our cosmologists were in attempting to understand universe.
Dark matter and dark energy, 2 black eyes on the face of
orthodox cosmology.

Easy answer; it's ... ( 2 years ago by Cyberpuppy63)

Easy answer; it's always been there - but we havn't been able to "observe" / measure it, until recently.

i think that dark ... ( 2 years ago by kosta1987)

i think that dark matter is everywhere this scientist is wrong its not 20 percent actually its 99 percent of the universe made up of dark matter and energy. I believe that its everywhere and we cannot detect it because it is invisible to us but to the naked eye it is. How u may say well ask yourself why does it turn dark when there's no light? Why is it black? Why not red or green or purple why black? Dark matter is so light and small that light passes through it no problem. Go to next post

Your approximation ... ( 2 years ago by issak)

Your approximation is close, the ratio is about 95% of all visible matter in the universe. 70% dark energy, 28% dark matter... a huge fudge factor in conventional theory.
In darkness it could not be ANY color? why because light IS the source of ALL color. That's why is black and not red or green...

I've read the man's ... ( 2 years ago by 4591rWaneleH)

I've read the man's book, he does not know anything.

If they don't know ... ( 2 years ago by 4591rWaneleH)

If they don't know what are they making program about? About not knowing. I've read the man's book,he doesnot know anything.

Well sir, right now ... ( 2 years ago by LateForaFlight)

Well sir, right now dark matter describes a theory that some scientists are trying to prove, and others are trying to disprove. Throughout the history of man, we've had theories that had been proven and disproven. We are living in a time where dark matter is something that's being postulated by a majority of people. Why wouldn't people want to see a PBS show about a theory that will probably be proven in their lifetime?

I'd say he knows ... ( 2 years ago by S1Z3M)

I'd say he knows more than you do mate. Having taken the time to devote himself to a lifetime of research, researching the contents of the book, and writing the book. He would at least know where the space bar on his computer is.
20 bucks says he would gun you down in some sort of debate.

I think we might be ... ( 2 years ago by quelorepario)

I think we might be reliving the debate of geocentrism. Even if it may sound "stupid" for some high schoolers and younger, the geocentric model it was a very sound and widely accepted theory for centuries. Many hypothesis tried to explain the little puzzling "loop" in the orbits of the planets around the Earth, until we had some technical advances to actually prove the real orbits of the planets
Dark Matter and the strange gravitational behavior could be the "loop" of our cosmological theories.

whats the matter... ... ( 2 years ago by rdvbailey)

whats the matter...matter is matter, soon you will find there is more than dark and light...

dark matter is te ... ( 2 years ago by JasonLIKESturtles)

dark matter is te waste product of gravity

Dark matter is a ... ( 2 years ago by bongoss0022)

Dark matter is a little thing called fractality

lol the first 2 ... ( 2 years ago by JasonLIKESturtles)

lol the first 2 seconds reminded me of terminator

supersymmetry ftw ( 2 years ago by emkajii)

supersymmetry ftw

I Love BPS. Thank ... ( 2 years ago by spectrumfrequency)

I Love BPS. Thank you very much for posting this! *Dances around*

its a hypofosis ( ... ( 2 years ago by smarticus757)

its a hypofosis (is the spelling right? lol)
they are thinking and learning unlike some people

is it possible ... ( 2 years ago by NickBlackDIN)

is it possible gravity is coverned not only by abount of mass, but also density? ex. 2 particles of hydrogen (in gas form) and one particle of oxygen (in gas form) have less garvity as one 'particle' of h2o in liquid form?
just my guss/suggestion

Array ( 2 years ago by BigGreedyBastard)

jackmechanix,
"dark matter is .. not dark. they should call it.. "WHAT MATTER" .. stupid intelligent scientists."
You know when they first discovered X-rays they didn't what they where, so they used x as a variable, the name stuck.
I think in the future when they figure out how to detect, measure and experiment with DM and DE we will see more namming similar to proton = 2 up quarks + 1 down quark
neutron = 2 down quarks + 1 up quarks.

actually, has for ... ( 2 years ago by saberxxtooth)

actually, has for of water has more gravity. since Energy and mass are directly related (einstein's thing) the more energy something has, the more mass. the more mass the "more" gravity. since gas forms always have more energy than liquid

either there is ... ( 2 years ago by chapparita1234)

either there is dark matter or us humans have to re think the concept of gravity all over again

okay, I found what ... ( 2 years ago by freetothinkify)

okay, I found what I was looking for. Sorry my wording was so bad.

IM NOT TRYING to ... ( 2 years ago by misskittyboom1234)

IM NOT TRYING to START any thing here
i just think if god wanted man OR woman
to know what dark matter is than maybe we will
fine out.also what DO YOU THINK IS GOING TO HAPPEN WHEN WE FIND OUT HOW TO CONTROL DARK MATTER will we destory our selfs?