The Expansion of the Universe

Fermilab astrophysicist, Dr. Dan Hooper, explains how dark energy is causing the universe to accelerate it's expansion.

Category:

Education

Tags:

• physics
• universe
• cosmology
• hubble
• einstein
• astronomy
• astrophysics
• science
• education

[Grealsa]

And in 2011 scientists have proven him wrong...

[im415again]

If i watch a bullet travel further and further it will eventually dissapear due to space + gravity ending up on the floor somewhere ahead of me. I believe that same concept applies with space. It ends up settling on the floor somewhere evolving until it is eventually gone over time.

[SuperMagnetizer]

Everything in the video is based on the premise that the Universe contains a FINITE amount of matter and energy, which is why no one can figure out the source of this "dark energy" causing the acceleration of the Universe's expansion.

[chevere0192]

if the universe is expanding, is it possible to tap in to the enrgy that drives that expansion?

[stopdemockery]

@TheHomelessCripple ~ Let's examine my "remedial grasp" of the situation. Likewise, the speed at which these objects are supposed to be moving away from each other is equally mind-bogglingly enormous. So, you're saying that if two objects are moving away from each other at light speed, in a thousand years they would appear (because of our great distance from them) to have not moved at all?

Your theory is utterly unacceptable!

[TheHomelessCripple]

@stopdemockery the reason they don't look like they've changed is because they are so freaking far away. The farther away an object is, the slower it appears to move. The same thing happens to the scenery in the background when you're driving your car. It's basic trigonometry!

Do you have even a remedial grasp of how large interstellar distances actually are? or how about the size of the Milky Way. The distances are mindbogglingly huge.

[CodyRicheson]

@ixataca, I probably don't know much more than you do on the subject, but I would suspect that because some of the galaxies we're observing aren't that far away from us, it's probably still expanding most everywhere. But I think it's a great question nonetheless.

[ixataca]

I'm too lazy to research on my own right now so any body can answer

since the (moving away)galaxies are so far away from us we are actually looking at the past, could it be at the present the universe is contracting right now? can we know?

[stopdemockery]

@xxxslayerxxx666 ~ Perhaps it expanded to a point of equilibrium, and remains balanced against the push of dark matter and the pull of gravity. We're just daydreams in the mind of God. But, the Earth is becoming his nightmare.

[xxxslayerxxx666]

@stopdemockery but then how was it created, how could there be a nothing, maybe it's just comes from parent universes, so it would be like how there was no me before i was born, cause you don't just come from nothing. So the universe has to at least be able to reproduce....but it still doesn't quite answer the big question where did all of matter come from in the first place, well, i have no freakin clue! lol.