It feels good to learn something new. I have no idea why people hate being wrong so much they often delude themselves into thinking they are always right.

Signed in to say just this. The spark in his eyes when he pieces it together for himself is the same reason I get up in the morning.

I love getting that awe feeling, when I suddenly understand something new, even if it's not completely new, it's new for me and it motivates me to learn more. Being proven worng in science is the time where I'll toss my pride aside and learn.

FlyingJetpack1 I hear ya buddy!

I agree with this conversation so much :)

watch pbs space time, much better

and he asked him out for a drink. XD

Knowing isn't brilliance. If you study something eventually you'd know fancy terms and sound 'brilliant', too.

@@mickobrien3156 They chose to pursue knowledge in that field, we didn't, everyone can be brilliant in their own fields if they are willing to learn

I guess a more correct name would be redshift, it's not the exact same thing. And that's not too far from the part when they talked about Hubble, even though they dont talk about that directly.

Nic0maK No. Redshift only applies to things moving away from us. Doppler effect is correct.

NerdNordic Stars moving towards us (shifting towards blue) are still described using the term 'red shift'.

well yes redshift/blueshift if you prefer but here i'm talking about the cosmological redshift which is not quite the same as the doppler effect, and i think that this is what can be used to determine the distance, since we know the average expansion rate of the universe, an object of such redshift would have to be at such distance, or so i would think. The point is that the cosmological redshift is very predicatable given the distance, but not for closer objects as we wouldnt see such things, we would see a redshift or blueshif it the object is moving away or closer but this is not related to the distance AFAIK. And that is when i think it can be called dopler effect, or doppler shift, depending on local velocity. Maybe that's me i could be understanding this the wrong way of course.

Nic0maK As I understand it (and I could be completely off-base), cosmological redshift--the kind that we see between galaxies--occurs not because things are moving apart from each other through space at some speed (which is how the doppler effect's redshift would be caused), but because space itself (and thus the wavelength of any light wave within that space) is expanding between the two objects. There's no real analogy to that on small scales that we're used to talking about, with the closest one possibly being the doppler effect... but as far as I understand, they're two separate processes.

I'm pretty sure he man-crushed on the universe just there.

Totally man-crushed.

What man-crush means? That he flirt with the guy? I hope not! lol

JGuilherme He got a theoretical boner for the guy. Now that the theory has been established, time for some "experimentation."

He had an ah-ha moment that was total fun to watch. Hank rocks!!! at 2:40 "But our planet moves" - the lightbulb goes on immediately.

we restrain ourselves with morals and ethics. then there are these tragedy of the commons-problems. only one atmosphere, and when one tiny nation pollutes it A LOT and gains economic growth from it, they just wont stop. some problems could be solved, if it would be acceptable to bomb coal mines and coal power plants around the world simply because they are in operation, and to put snipers in the few primary forests we have left that just put a bullet into anyone who carries a chainsaw, causes a fire, or does illegal logging. when people drill holes into rhino horns and fill them with a poison that causes extreme vomiting and diarrhoe (not even death), trying to save the rhinos from the stupidity of chinese medicine, thats already controversial. and when someone from sea shepherd attached magnetic mines to some whaling ships in port to sink them (noone got hurt, they sank slowly and peacefully in port), thats going too far.

The duality of man. You can never forget that for every horrible thing you see on the news an amazing thing happened that is almost never reported.

We're smart, but we're not as empathetic as we could be.

iamihop Oh, I understand perfectly WHY we're douchebags. I just hate THAT we are XD . I've given it much thought over the years, and the only way for true peace to evolve would be for it to suddenly occur in almost everyone simultaneously. Which...well, let's just say is far too improbable to think it'll ever happen. Unless there's a disease that kills off all the assholes :P

I think it's important to draw a distinction between knowledge/understanding and morality/ethics. Science is designed to poke the universe and figure out how it works, what is around us, inside of us, what we're made of and why things happen. War, greed, violence and other unpleasant human behaviors are in the realm of ethics, which isn't really something science is designed to deal with (e.g. from a purely objective perspective it is sensible to kill one healthy individual and harvest the organs in order to save the lives of five other individuals, assuming they are all equal and perfect matches, but of course almost everyone will agree this is completely immoral and wrong). Another factor that may contribute to detrimental human activities is a variation of the prisoner's dilemma: in an ideal society we would all be selfless and be more than willing to share and give anything we have to anyone who needs it. Everyone would benefit. But it only takes one person to take advantage of the situation, or 'betray' society, by taking but never giving. Then that one person has a greater benefit than the rest, which in turn makes it less convenient for others to give freely: now there's a risk that if they give, the action may not be reciprocated. More mistrust is generated and even more people choose to be greedy, being willing to obtain but reluctant to give.

Well the farthest away thing we can detect is the cosmic microwave background, wich the light coming from it is so old that there were no stars back when that light was emited. The farthest away galaxy that we can detect was formed 420 million years after the big bang so the light from that galaxy has been traveling for about 13 billion years. The only stars that we can see from this super far away galaxies is when there is a supernova. Creationist (or at least some) claim that the speed of light has not been consistent and thats why objects seem more farther away than what they really are.

***** Thank you sir. I will smoke a bowl to the 420. :) *High 5*

We discovered an early forming galaxy at over 13.2 billion light years away when the Universe was still developing into the form we see today.'' Oh, I see it was already answered :)

z8_GND_5296 is a galaxy discovered in October 2013. It was approximately 13.1 gigalight-years from Earth when the light that is reaching us now was emitted (it's farther away than that now, because the universe is expanding). That is 4.0 x 10^9 parsecs. 1.23427103 × 10^23 kilometers. It was forming stars at an incredible rate, about 300 stars a year, a mere 700 million years after the Big Bang.

They either think that all scientists (and that's not even only astronomers of course but also geologists, paleontologists, archaeologists and biologists) got it all wrong by seven orders of magnitude or so, or that God tried to fool us. Yeah, I don't know which of these two explanations I find more mind-boggling either.

It really depends on the school, it seems, since I recall some schools doing the same thing in my country.

Well your seasons are opposite. It wouldn't make sense to have summer break from June-August like we do, because that would be winter in Australia. It makes sense that your school is shifted by a few months, to account for the shifted weather patterns. Which bring up the question: do you even have winter in Australia? Or is it just hot all the time? Because that would kinda make my point moot...

contrary to popular belief, it gets freezing here. We are pretty much as close to Antarctica as you can get without going white on a map

Both extremes

Ben Aguilar Today in Melbourne it rained so hard that I started to believe someone had opened a portal connecting the bottom of the ocean to the sky. Yesterday it was pleasant and sunny.

It also blew Hanks :)

This was one instance where I was surprised that he was mindblown. I took trigonometry in high school and was able to discern the trigonometric parallax way back then. The Sine/Cosine laws are very handy.

I think it might have been the fact that we have things that can measure such small movement that blew his mind.

jg martn No, he wasn't amazed by the idea of parallax. He just hadn't thought about how the movement of Earth allowed us multiple vantage points from which to view stars, so when Phil mentioned that, it was one of those, "OH! RIGHT! I can't believe I didn't think of that!" moments :)

IceMetalPunk You need multiple vantage points (at least two) in order to compute trigonometric parallax. It's simply a fundamental requirement. There is nothing mind-boggling about this. 0.o

jg martn Yes, obviously, but he just didn't think about how the motion of the Earth ALLOWS for multiple vantage points from the same planet. It's just one of those things where the pieces are there, but the connection wasn't made until this video :)

If you give five dollars to that charity, they use the collected money and all the other contributions they get to finance their program. Your five dollars are nlt the only thing that pay for it, but you feel better if you think it is that way.

That's just misleading.

Yes, but it does raise more many for charity than simply saying: Give us money, so we can help.

Basically $5 is a lot is some country's 30 years ago $5 could get you a decent car out in Africa

www.wolframalpha.com/input/?i=poverty+zambia If 75% of the population is below $1.25/day, it's safe to assume there is some large percentage living on much less. Like $15/mo for a family. In which case a third of that is going to a single child (if they were attending school and eating enough).

+momori momo Well, you kind of don't, from what I understand. We only have light to tell us the whereabouts of something in the universe and light travels at a relatively slow speed, in comparison with the size of the universe. So when we measure something, we are measuring the distance the object was at the time the light our eye's are seeing gets to us. Since that light left the object it has moved and the universe has expanded (to include our solar system). You can, however, know the rate of expansion and add it into the equation, I suppose.

+ABDULAZIZ ALAHMADI more like 300,000 times further!

Those stars are moving with us just like we are.

+momori momo We can measure motion of stars (called their proper motion) using red-shift. Z = (λobs - λemitted)/λemitted ≈ v||/c where Z is the red shift. λobs is the wavelength we observe. λemitted is the wavelength emitted (we have to measure the star's spectrum to determine what this must be, it's somewhat involved but pretty coll). v|| is the velocity of the star in the direction parallel to us. c is the speed of light. So we can use this technique to determine how fast the star is moving away or towards us. You can apply this technique to galaxies as well. Hope that made sense.

***** plus the movement of some stars cancel out the movement of our solar system has some of them move along the same path as we do.

You pay for that education and healthcare with your taxes.

same here !

Awesome. Where do you live?

Norway, Sweden, Denmark and German has a good amount of free things.

Yair Gutierrez norway

From the scale of loose to pinpoint it's at a guesstimate and is still theorized and not proven fact.

GreatOak99 You seem to not understand that there's no difference between theory and fact. If we have no theory for something, we have yet to explain that thing. If data contradicts a theory, the theory is discarded. Theories are only well-substantiated explanations of data we have. What you're saying is like saying we are only guesstimating that the Earth has gravity or the Sun has gravity when in fact we have gathered data and figured out that they have gravity.

Sometimes the margin of error is as low as plus or minus 1%.

GreatOak99 --Parallax is a testable proven way of measuring distances. So quick talking out of your ass.

Kai Simon if they had no difference we wouldn't have two words. and im sure you can prove gravity exists, but proving a planet is that far without experiencing its distance is another matter

Existence is expanding into eternal non-existance...

The last time I checked, there was no consensus on this but there are two prevailing theories. Basically, the big rip, wherein the universe just keeps expanding and all the planets and stars rip apart and atoms scatter until the universe is essentially empty. That or the big crunch, where at some point the universe acts as an elastic, begins to resist the spreading and then eventually pulls everything back in to where we started before the big bang.

***** haven't heard of that one. I'll have to look into it.

... Close enough.

fossilfighters101 haha I tried.

Brandon Jin ahh gotcha.

***** you mean 3D distance formula?

I mean...life is just like all other matter, though...

The average galaxy contains many times more neurons than the human brain does. It would have to be a relatively small galaxy to be close. Some of the larger galaxies contain upward of a trillion stars. However the human brain is one of the most complex objects humans have ever observed. The quantum world is also quite the interesting place too.

jojo300001

jojo300001

***** Not really

it comes in for distant galaxies only, it's not something we could observe on a smaller scale i think, it has to do with how fast things are moving closer/away from you. i guess since we have an idea of the average rate of expansion, and because it's rather uniform in every direction we look, knowing how fast a galaxy is moving away from you by mesuring its red shift could in turn help determine its distance.

It has to do with how quick the object is moving away from us.

Nic0maK David Markus Thanx. 😁

You were correct. As David said, red-shifting is used to indicate how quickly a distant object is moving away from us. Once we know how fast it's moving away from us (due to the expansion of the universe) we know how much space is between us.

Ryan Harding Yeah, that's why I was surprised when it didn't come up in the discussion. Thanx. 😊

How much of the local currency are 5 dollars? Several thousand.

Not everybody is like you. American currency in other countries can be worth a fortune. 100 dollars seems trivial to a millionaire. 1 dollar seems trivial to the average american. 1 dollar can mean life or death for some people, especially if they happen to live in 3 world countries.

also money is pooled together and the charities buy in bulk and probably get some discounts from companies, all reducing the cost for one child

5 dollars translates into a lot of money in some countries because of the state of their economy.

PitchBlackFox Also, many companies and governments will offer to "match" the donations made by other people or groups. If you get enough groups doing that, your US$5 might turn into a US$20+ by the time it actually hits the ground in Africa.

90MILLION VIEWS RIGHT THERE!

watch pbs space time, much beter

Wow, racism

More than you learn most likely mr.high school drop out

Why racism? I dont care they are black, white or blue. There thousands of people are dying without food and water but you want to spend money make bush people read..

Disciple Demon The stupidity flows strong through you.

Disciple Demon So they can't afford an education so you think they shouldn't get schooled because of their lack of education? What the fuck, man.

But we also know that we're part of it, atom for atom

DonTHEhandsome1 Neil deGrasse Tyson, on being asked “What is the most astounding fact you can share with us about the Universe?” - “When I look up at the night sky, and I know that, yes, we are part of this Universe, we are in this Universe, but perhaps more important than both of those facts is that the Universe is in us. When I reflect on that fact, I look up - many people feel small, ’cause they’re small and the Universe is big, but I feel big, because my atoms came from those stars.”

I can't even deal. I just can't.

no i dont, i feel even more special for being a part of it

I see it the other way. Out of all these thing we found, we are the only place that has created such diverse and intelligent life.

Religion isn't about intelligence, it's about our human nature to desire something greater than our earthly existence. A lot of people like the idea that when they die they move on to a better existence rather than just becoming a rotting corpse.

Explain to me how the universe cease out of nowhere ... And also explain to me how our earth is literally perfect in every way to support life. Perfect heat to hold water and IT HAS ITS OWN ATMOSPHERE! Also the perfect size for gravity to keep the world from flooding ... Sci show did an episode on how perfect our world actually is set up ... Ya.

TheWildOnesAreBack well if it wouldn't be perfect there wouldn't be life and if there wouldn't be life there wouldn't us asking this questions. Also perfect for us might also mean that it literally shaped us to find it perfect. An alien lifeform might consider his world, which can be totally hostile to us, to be perfect.

Comes more from the fear of death imo.

TheWildOnesAreBack Once science finds the many other planets out there that are also "perfect" for life, this thought process will be gone, hopefully.