History Channel The Universe - Pulsars and Quasars / Full Documentary

[benskin79]

Um... 30 times per second flicker rate is detectable by the human eye, provided that one can isolate the subject. It's not difficult to see this in light sources here on Earth, but when looking at the night sky, it is pretty darned difficult to "catch" it. In fact, for all of their limitations, our eyes are still capable of amazing detection. I can see my own blood cells in real time, though not in color. Try it, stare at a neutral background and relax your irises- it's like donuts in a pipe. :)

[InkaKing]

amazing.....

[RobbieKalsbeek1981]

Thumbs up for Amy Mainzer.

[ajosep12]

I love you.. why? For uploading this awesome episode from this awesome show! :)

[90hamg15]

This is so stupidly Americanized. Documentaries are not action films, stop trying to make them as such. For a good example of a documentary series, see the latest BBC ones, narrated by David Attenborough. Life, Planet Earth, Frozen Planet... That's how to make documentaries.

[dceugene]

@90hamg15 if your country has a mcdonalds YOUR americanized

[TheSoulDoubt]

@dceugene My country has a McDonalds, more than one in fact, and yet I still know how to correctly use the English language ("you are" abbreviated to "you're" is not the same as "your" which is possessive), therefore I do not consider myself Americanized...though I do fancy a bigmac right now and for the most part "you're" probably right!

[LBPCraftsman]

@dceugene You're... i had to. heil grammar hitler.

[kuruptzZz]

@90hamg15 just because it's more fast-paced than an Attenborough doc doesn't mean it's an "action film"; wtf are you smoking? This is a great series that I learned a lot from.

[killameh34]

I wonder what a Quasar would look like In our galaxy cluster :D

[BALPROM]

very instructive !

thank you !

[Wtown06tt]

the universe is electric, we need to get over the dogma of einstein and newton, we should make the next step

[BOLATI1974]

3 Aliens on Earth

[LordWhorfinX2]

More science and less metaphor. This is ridiculous. Take metaphor and analogy away and you have 5 minutes of a show :/

[Saur]

@LordWhorfinX2 Absolutely agree, it drives me crazy!

[SnipeSpace]

I'm not going to be able to fall asleep today ;(

[Boogyman4050]

Great episode. Thanks for posting it.

[VivaSaiHe]

Amy Mainzer is too wonderful...

[sockington1]

I've heard of the cosmos', but I've never heard of the cosmows' - any idea what it is anyone ?

[noname2useable]

I want a telescope really badly now.

[Blamepandora85]

Damn. I think I've now seen them all.

[sungmoon1987]

i can't get over how he said that when our galaxy hits adromono galaxy we'll turn into a quasar....OMG!!!! We're gonna be quasars!!!

[MegaRoFLL]

lol a girl that is smart XD

[SweNoXc]

This is the most interesting program ever.

I love this :)

[Kooper05]

39:00 Whacky Wailling Inflatable Arm-Flailing Tube Men! ...She doesn't look like Al Harrington... +1 hot science chick!

[kcodner]

@beautifulwomensful yeah theory nonsense lol, also, who says the universe is infinite or that the physicist that are uncovering the mysteries are not able to wrap they're head around the numbers.. After all, they are ones who invented the equations lol..

[ziz4ever]

@kcodner you base your answer for @beautifulwomensful on somthing that athor people have to do for you ....so until they prove it ( btw it will never be) sit down end keep your commnets for yourself.

or explain us what infinite is ??

[kcodner]

@Merjobrothers what ever you say. Youre not a genius and you are not an astronomer or physicist. So who are you to spread you're garbage

[macoport1]

Anyone know where to find "the history of the world (in 2 hours) ?

[VEEFOURVENDETTA]

I have it on in the back ground at work rather than listen to music...I learn things while working at my desk just from listening and not watching...

[vomoka121313]

0 dislikes :)

[canyouletmesee]

season 4 episode 10

[jamafrican657]

I'll d love to make love to Amy in the Keck observatory after a nice star gaze.

[beautifulwomensful]

It is the most complex thing for our brains: the universe.

For the infinite is unthinkable, an incompressible and exhausting puzzle, which our brain can not interpret, that goes beyond our imagination, we'll never be able to unravel, but we can imagine, idealize, but never get anything concrete, which I call: theory nonsense.

[Originalclassics1980]

@beautifulwomensful : makes perfect sense we realy are nothing

[phooshiar1]

BANG! 00:02

[iKilledJohnRambo]

oh Amy Mainzer...

YOU make me dizzy!

[johnnylifeson]

If light can travel around the Earth AE 7 times in 1 second, how can a pulsar spin 100's of times a second being about 6 miles across ? To remain within the laws of General Relativity , the pulsar would have to be 186,000 miles in diameter to produce 1 pulse a second. If some pulsars are spinning 950 times a second, then to remain within the laws of Physics, the pulsar would have to be 186,000 x 950 which would = 176,700,000 miles, just to pulse 1 time every second. That's my question.

[tinyflea1482B]

@johnnylifeson

Do not forget to halve it because 1 pulse is half a rotation I think.

So if it rotates 100 times a second that is 200 pulses a second. If it's making 950 pulses a second it's doing its spinning at 475 revolutions per second. If that makes a difference?

[Acrimonator]

@johnnylifeson Circumference of a circle being Pi multiplying D, Manhattan being 13,4 miles long, we have a circumference of about 42 miles, while Earth's circumference at the equator is 24,901.5 miles. Now light travel at 186,000 miles per second, how many times needs that 42 miles sphere need to turn on itself to acces light speed... About 4,428 times, simple math.

I don't know where you get that "pulsar would have to be 186,000 miles in diameter to produce 1 pulse a second."

[Acrimonator]

@johnnylifeson Actually, the fastest known pulsar is PSR J1748-2446ad, located some 28,000 light-years from Earth in the constellation Sagittarius. It's spinning 716 times per second.

[deadbeat140]

Fuckin' magnatars; how do they work?

[sg4895409]

Cool

Just add me on facebook. Saul.g100@yahoo.com

[SIETETIZ]

@zetastarsystem its very hard to concentrate watching her

[megamyers]

@zetastarsystem how does any science get done at the JPL with her around?

[machineunit]

@megamyers Amy Mainzer is TOO FINE.

[jaymorpheus11]

around 25:00, promoting his wack album on the history channel.

[DemiathDoomhammer]

what happens if one of those powerful Magnatars would be confronted by a Black Hole? would it survive? lol

[UFOHunter86]

@DemiathDoomhammer Great Question, maybe we will be lucky enough to see it one day!! We can only hope!

[aljay45]

very interesting...

[marwahmony]

Wow,,,thats AWESOME Info...........!

[marwahmony]

Wow,,,thats AWSOME Info...........!

[softan]

@lovesangels no galaxies are not formed by rotating neutron stars (pulsars). Quantum fluctuations in the early universe are a likely  cause for structure to form in space.

[kayakbruce1]

@softan God farted!

[wolverinezapper88]

in the end of the univer could any life use a pulsar for energy and become the the last bon fire? is the life span that of a dawrf star?

[softan]

@wolverinezapper88 Pulsars are dead stars already so using the word lifetime seems paradoxical. But since they loose energy constantly the rotation slows down and they will eventually stop and as a result it wont be pulsating anymore thus it wont be a pulsar anymore.

[6un6lord6]

i could watch this all day long..best show ever.

[sockington1]

@6un6lord6 i could - if it wasn't for that fellas irritrating simpleton-like grin

[ihghhgh]

awesome video...thanks

[lovesangels]

cool