The Universe - Dark Matter. part 6. season 9. HDTV.720p

A look at the theory of dark matter -- the undetectable mass thought to make up 96% of the universe, and dark energy -- the unseen force that is expanding the universe. Physicists use the latest cutting-edge technology and conduct groundbreaking experiments in an attempt to discover more about these mysterious forces.

"Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use."

Category:

Science & Technology

Tags:

• The
• Universe
• season
• two
• Dark
• Matter
• Energy
• 2007
• 2008
• episode
• history
• channel
• geographic
• military
• horror
• movie
• aliens
• alien
• Extraterrestrial
• life
• documentary
• weapons
• space
• scifi
• ufo
• wildlife
• widescreen
• discussion
• hunting
• environment
• warfare
• commentary

[TheAenima86]

@Bassotronics The Theory of General Relativity shows that the universe is not static, and more recent discoveries have shown that the universe is expanding at a steadily increasing rate. Dark energy is merely the term we use to describe the energy that is causing the expansion of the universe (a fact). It exists because the universe is expanding. The existence of an energy causing the faster and faster expansion of the universe is a fact; we call that energy dark energy.

[TheAenima86]

@dumapies We call it "dark" matter because it is, in theory, directly unobservable. We can measure gravity and heat as energies because they aren't dark; by definition, the label of something in physics as "dark" means it cannot be directly observed. The concept is similar to a black hole--we can look straight at it and not see it.

[dumapies]

@Bassotronics

I would agree with not being able to find dark energy, but dark matter is something that might be somewhat tangible. And ever dark energy, we can measure energies such as gravity and heat and what not. What would make dark energy any different?

[Bassotronics]

I don't want to damage the faith in finding this dark energy and matter but....trying to find or capture dark energy or matter is like trying to capture the inertia that stops a car in a cup to drink it. Its impossible. Its a force that acts upon our normal matter, but there is no way to "capture" it.

[zukodude487987]

@nubpwner303 Last i remember that gravity wasn't a force that sucked objects together. I remember Einstein said that gravity is the curviture (or warping) of space-time. The illusion of force from gravity comes from the fact that we live on a 4 dimensional surface thats either flat or spherical. If the surface was spherical then i would have a theory of what dark energy is.

[nubpwner303]

@zukodude487987 you're equating gravity to matter, gravity is a force unlike matter and thus does not have mass, and thus no inertia, newton's third law would not apply. Gravity is merely a curvature of space time, there would be no "anti-curve" to counteract this, furthermore the magnitude of gravity is dependent on masses of objects, while the force applied by dark energy causing expansion is uniform throughout the universe.

[bluewhale18]

I live for this kinda science

so fascinating

[zukodude487987]

@jimmyz512 What i proposed is nothing more than a theory. This idea seemed logical due to the symetrical properties of nature.

[jimmyz512]

@zukodude487987

You're trying to equate Newton's Third Law (or 2nd law, depending on how you interpret the 2nd law), with Dark Energy/Dark Matter...

If it was really that easy, this documentary would never have been produced.

[zukodude487987]

I remember that for any amount energy i put into something, there will be an equal amount of energy going in the opposite way. For example if you have a car stuck in the mud and you try to drive out of it, then you will see that when the car is moving forward it will also throw mud into the opposite direction. Now what if the same rules applied to gravity. What if gravity gave out an equal amount of anti gravity which we call dark energy.