Year On Earth

[786baqi]

This is read by a professional reader, not a teacher.

no transmission of understanding was passed, no meaning or modulation of understanding.

I can't understand something if the one who is transmitting it doesn't.

It had no soul.

[julioverne24]

somos mucha gente que nos interesa este tipo de videos, pero no entendemos ingles si hubiera alguien que nos los tradujera seria fantastico.

[jtmedina75]

I love science

[thenendo]

Ahhhhhh the narrator is constantly "up-talking". Every single sentence ends on a high pitch, and it really distracting once you notice it.

[baldclub]

Great job, had to rewind a few times but it's great stuff. I don't mind the narrator at all.

[Leon612]

Happy 2012! The Mayans are bums!

[WillBlocher]

Great vid! Ditch the narrator, though. He sounds like a minister giving his son the "birds and bees" talk.

[MsKoali]

See what a whole lot of people have done for us. And very quietly too. I love this.

[lowrider692]

nice clip..thx

[eldiagrama]

Pffff. Ill have to rewatch this.

Also, It would be very nice to have a transcript of the video in the information.

[cassiopeiaproject]

@eldiagrama You can find transcripts to all our videos on our web site, just google cassiopeia project to find us.

[masluxx]

very cool video, ty for posting

[b0gdanB]

oh c'mon, when it's at max distance from sun the earth is 152 million km and when it's at min distance is 147, in the first simulation the proportion is almost 3:1. That's confusing ...

[ovariesniper]

Sure wished my attention span was longer than 2mins....

[MrBragster]

i find this more interesting than school

[Johndoe9990]

Five people don't like to know things.

[tastysandwhich]

loving this breakdown, but man they need a different narrator

[Oscy]

Why must the narrators in space videos have annoying/patronising uber-American voices? Someone hire a Morgan Freeman impersonator.

[yonian]

@Oscy

I get what you're saying, but careful enunciation is useful for people who aren't native speakers of English.

Morgan Freeman might sound like God Almighty to Americans, but he's a bit difficult to understand in some other parts of the world.

To be really annoyed, try listening to "The News in Simple English" on the Voice of America shortwave radio.

And. Now. The. News. In. Special. English. (Long pause)

Today. The. President. Said...

[themix92]

mind=blown

[joecondrey]

What is the song used starting at 5:35?

could you please post a music listing??

[jbrownell42]

The analemna is related to the earths movement relative to the sun, what yu observe at the equator as compared to Oho will be different

[mudokwon]

Fantastic!!! Bravo!!! Thank you for that!! Outstanding!!

[YukiCrossist]

Does the north time change in time? Why or why not?

[goandras]

Do you know that the small pyramids near Khufu’s pyramid can show the four most important days of the year? (Youtube: Khufu's hidden calendar)

... – and in their original form they can show the 12 age of the precession year?

Best regards, András

[huweybaby]

Wibbly Wobbly Timey Wimey...Stuff

[illuminatedgirl]

high or not, the universe blows my mind with all its mysteries

[CogitoErgoCogitoSum]

How very... dynamic.

[CogitoErgoCogitoSum]

Time stamp: 2:06. I never understood that analemma. You said "take a picture of the sun at noon". Is that noon mean solar time or is that noon apparent solar time? Perhaps you mean the sun at culmination? Really, when are these pictures actually taken?

[cassiopeiaproject]

@CogitoErgoCogitoSum Wherever you are, take a picture of the sun at noon every Tuesday for a year and superimpose them. The analemma for your latitude is the result.

[CogitoErgoCogitoSum]

@cassiopeiaproject Im going to assume youre a moron, since you didnt really elaborate on or reflect on what I have written.

[CogitoErgoCogitoSum]

@cassiopeiaproject Are you seriously the same person who made this video? Because you seem more intelligent in the video than you are in this reply. You totally dont understand astronomy, do you? I asked a simple question which you avoided answering; you presumed I am stupid and decided to "dumb it down" for me to something simpler for you to answer.

[CogitoErgoCogitoSum]

@cassiopeiaproject I asked a very simple question. WHICH NOON ARE YOU REFERRING TO?

[CogitoErgoCogitoSum]

Can anyone answer my question? To make an (highly accurate) analemma, does one take a picture of the sun at noon local apparent solar time? At noon solar culmination? Or at noon clock time, ie every 24 hours? Does it matter? Perhaps I can take a photo every six hours?

[CogitoErgoCogitoSum]

Does anyone know the video editing software that does these animations? Can I get one for free download?

[pokroops]

@CogitoErgoCogitoSum I think it's mean time, otherwise you would get a straight line, not an 8.

[sg2401]

Very good

[SuperAfzal2011]

nice video i like it

[nartworks]

Yep!

[girzone]

and all this just banged in to existence.. :/ lol sure.. 

[lavishlyDecorated]

You just wrinkled my brain

[yurianne07]

perhaps changes in climate due to periodic changes in earth theta and travel path around sun? earth does not simply travel a path as if it were an orange rolled across the floor....

[petrojak2]

Both the obliquity variation period (41,000 y) and the inclination period relative to the invariable plane (100,000 y) are mentioned as contributing to ice ages. But the 100,000 y period is much stronger  in the temperature record. Ocean currents are the most powerful method of heat transport between tropics and polar regions and may be interacting in a resonant way with the 100000 y cycle.

[vinayshah17]

wow...awesome graphics..did u created by own or u using some software? if so then pls name of the software

[BuggaUgga]

Added to my favourites! Thank you for this great video. So many variables I never knew before! Thanks!

[atomicmrpelly]

To which they would respond "Calender years you freak!"

Awesome video though, going in my favourites!

[etniko]

I was looking for god and I found this.

Heaven is full of orbiting planets.

[MrlittleFrankenstein]

woah i was 110.110 viewer and 110 coment :)

[FranklinP77]

You guys make me wuzzy ;)

[snufleufugus]

Where was the part that shows the stars rising filmed? I showed this to my astronomy teacher and he'd like to know

[blacknwhite6969]

at about 6:20 that fun sound made me thought i was receiving a facebook message O_o

[LifeStudentNo1]

@blacknwhite6969 me too, i was checking my Facebook every other sound the video made lol

[Greeb17]

9:08 Best pickup line ever.

[wafflegirl506]

@Greeb17 That actually made me howl :')

[cloverfield911]

@Greeb17 ....if your Sheldon from the Big Bang Theory!!

[qbslug]

So we got spin, axial precession, axial tilt, orbit, orbital precession, eccentricity cycle and orbital inclination. Is that it because I'm dizzy now.

[frickfrock999]

No wonder my dizzy spells are getting worse.

[TalkingPixiesHeads]

what a load of bullshit

seriously what the fuck is this.

Earth's orbit is circular!!

If the Earth's distance from the sun varied even a little bit there would be temperature change so great life would perish.

Get your science right.

[Bwolber]

@TalkingPixiesHeads derp

[redteamdarkspear]

@TalkingPixiesHeads It varies by over 3 million miles, every year.

[hackthagibson]

I made it to 50 seconds.... WORST. NARRATOR. EVER.

[pat442389]

i love that name cassiopeia... where is that star located?

[Wishingstarification]

Why didn't you mention lunar years?

[Wishingstarification]

This is awesome man!!!! You rock!

[wjship]

Is the analemma the same wherever you stand on earth? I thought that it might have a different shape at the equator than it does say here in Ohio. Still a figure 8 at the equator but with the top and bottom loops of the figure being equal. Seems to me that it would have to appear different to an observer at these different locations. Am I correct in assuming this?

[cassiopeiaproject]

@wjship You are correct.

[pokroops]

@wjship As far as I understand, it's the same, but it rotates. On equator it is oriented horizontally, near poles it's vertical.

[rrave24]

I`ve always thought the Sun is going around the Earth...

[rana946]

Allah hu Akbar, 1400 years ago The Holly Qura'n Says: "It is he who created the night and the day and the sun and the moon. They swing along each in an orbit."

[ptoplife20K]

Among those related to this topic, I like your video very much. However, I hardly catch up with specific terms especially when the narrator voice goes fluctuate up and down. It will be very much appreciated for those who do not speak English as mother language, please sub Eng. Thank you.

[cassiopeiaproject]

@ptoplife20K You can find the English transcripts for all of our videos on our web site.

[RichardCannonwalker]

If our earth got closer to the sun by that path, wouldn't we die?

[ShwangShwing]

What causes the change in the earth tilt? Is it true that the moon stabilizes the earth tilt and how?

[cassiopeiaproject]

@ShwangShwing The largest factor causing changes in the axial tilt of the earth is the gravitational effects of the sun, moon and the other planets. And, yes, the earth's moon is very large and has a stabilizing effect. If it were not for the moon, earth would be more influenced by the gravity of the other planets and would exhibit larger swings in axial tilt.

[givehope2lives]

@cassiopeiaproject I have watched a couple of your videos, They are amazingly educational. I was curious about the suns orbit around the galaxy which I have a hard time finding. Is this video in some way accurate?

watch?v=zBm12cIUj5k&feature=re­lated

It makes alot of sense to me, But I wanted to know your opinion.

[cassiopeiaproject]

@givehope2lives The concept is indeed accurate. As we point out in our relativity video, the motion of our sun about the center of our galaxy is at a speed roughly 7 or 8 times the speed of our earth 's speed around the sun.

[cassiopeiaproject]

@givehope2lives I believe our sun's motion is generally toward the star Vega which is northerly enough so that indicating the sun's motion as generally toward the solar system's "north pole" is also accurate. As in our own videos, the relative sizes of bodies and orbits are not correct.

[TheWorldOfJames]

i'm high right now and this is blowing my mind.

[aes8sea]

@TheWorldOfJames

I'm not high, and it's still blowing my mind!!!

[aes8sea]

@TheWorldOfJames

I'm not high, and it's still blowing my mind!!!



[MrTr0llol]

@TheWorldOfJames omg me 2

[whoiscraig]

Interesting, but his voice is awful.

[7arani]

nice vid but i would like some sources and further reading... irritates me how hard it is to verify simple things like this... and even when i do the numbers are typically of compared to other sources by up to 75%... anyway a source would be incredibly usefull

[deathxtra]

I hate this guy's voice. It's like he's trying to explain something to an idiot. Always ends on a higher pitch, I can't bear listening to this for 10 minutes.

[Ajihood]

Alot of motion I was not aware of. Good job!

[Rationalific]

Why are we not taught this!? I'm a bit angry. I had no idea about this stuff. I'd heard of an elliptical orbit (which is usually represented as circular), but I had no idea that it varied over time, both around the sun, and compared to the planes of the other planets (like Jupiter). I had no idea how ice ages started. I never learned this in school.

I bet more people can name Angelina Jolie's adopted children than can name the ways to measure Earth's year. Talk about misplaced priorities.

[Availablenickname1]

@Rationalific You can learn about this anytime you want. :-) Imagine teachers try to explain that at elementary schools...

It might make people to think, which is dangerous. You can´t manipulate thinking persons easy ;-)

[D4TR0LL]

Fascinating, I have lived nearly 50 years now thinking that it is normal for planets to rotate around their suns in 2-dimensional planar orbits. No more. This would be an extreme anomaly.

[frooglerman]

You can't explain creation and life with your so-called logic, so don't even try. The obvious answer is that the flying spaghetti monster did it all!

[OTfor22]

Eat this, christianity.

[lgoopio]

@OTfor22 this has nothing to do with religion.

[welstijlfilms]

I published this video on the Dutch website WELSTIJL (17 july) Kind regards Sem Mallée

[birdsofbalt]

I kept hearing facebook pops during the video

[j4pan]

i don't think (wo)man will ever completely grasp god's creation because we simply don't have the capacity to understand perfection but the more i learn about it the stronger my faith

[Evilfisher]

ops i voted wrong

[sushicam]

Now THIS is too cool for school! I actually learned a lot from it.

[stefanbatts]

This makes me want to ask one question. If we were to lose our planetoid Pluto would the Earth still be livable?

[cassiopeiaproject]

@stefanbatts Yes. Pluto has a negligible gravitational effect on earth.

[HHamanyy]

@stefanbatts yes no

[SlaunchaMan]

If I told someone how old I am and they asked if I was measuring in sidereal, tropical, or analemmic years, I'd say, "Fuck you, I mean years as measured by the Gregorian calendar."

[cassiopeiaproject]

@DavidWilliamson1982 Thanks for catching our error.

[sinfulparade]

@SoulPsyched lol. You're funny.

[UnfairDinkum]

@SoulPsyched You DO realize, I hope, that when you can apply "my made-up cloud giant did it" to EVERYTHING IMAGINABLE, it sort of becomes meaningless.

Yeah, sure, any omnipotent being could make everything. If I had all the power to do everything, I could've made this, too. That doesn't mean that omnipotent beings exist.

It's like saying Professor X is real because people sometimes become inexplicably disoriented or confused.

[zakooldude]

@SoulPsyched @SoulPsyched Yes, because "God" would make something like the "plane of unchanged total angular momentum of the solar system." Just because it's too complex for you to understand doesn't mean that some divine being made it. "God" is something man-made.

[zakooldude]

@SoulPsyched Yes, because "God" would make something like the "plane of unchanged total angular momentum of the solar system." Just because it's too complex for you to understand doesn't mean that some divine being made it.

[rwmjones]

This could have been good, but the presentation was spoiled by a lot of "usability" errors. Display numbers from the v/o on screen. Link the graphics and the v/o more clearly. In the analemma/rotation graphic, flash the sun's position as the earth rotates. In general make more of the relationship between what we see and the physical mechanics of what's going on.

[marlowman]

Interesting, but the narrator uses one "melody" for every sentence, devoid of meaning or expression. If the graphics were all in black and white, it would have the same effect.

It gives an amateurish tone to the otherwise well-thought-out exposition.

[Isaharif]

This was extraordinary, I was mesmerized all the way through. What's even more fascinating is how the data were collected!

[EricLobdell]

Remember, that the graphics presented in this video are very exaggerated, and not to scale. The earth's orbit is nowhere near as elliptical as presented in the video.

Cool vid though, lots of precessions that I hadn't considered before.

[planetrob555]

@EricLobdell Yeah I was thinking the same thing. Could be a bit misleading.

[OOFFLEO]

@EricLobdell boooooo!

[OrangeKyo]

@5:40. Due to the sizes and distances, I feel that the gravitational effects of other planets should negligible. I believe the reason of the spinning of our orbit's ellipse is due to relativistic considerations on the kepler model. Can anyone else confirm?

[gpedder]

fantastic video

[DrakeMagnum]

outstanding video!

[SatansSpatula]

Most annoying narrator ever. Sounds like a cross between a pedophile and one of those midwestern girls who end every sentence like it's a question.

[qubei]

Remind me to reposition my solar panels in 14,000 years time.

[J0kerofHearts]

why is the orbit not circular? if the earth's orbit was that elliptical, we'd all freeze and burn.

[sharpezor]

@J0kerofHearts yeah the orbit should be circular. The orbit is only slightly eccentric.

[pobox113]

@DavidWilliamson1982 post a reply a year later WIN!

[sinfulparade]

Good video, bad narrator. Let's have David Attenborough!

[yazid129]

@sinfulparade I liked the narrator, for some odd reason the voice made me feel comfortable. It was quite uplifting.

[ewerybody]

@yazid129 : I have to agree with sinfulparade: the narrator made listening quite a pain. His modulation is so repetitive and unnatural. found it almost disgusting.

[sinfulparade]

@yazid129 Yeah, he was interesting. I suppose a new take on narration. But as ewerybody said: repetitive and unnatural.  That's what I didn't like. But youtube always cares for everybody's opinion...right? JK

[Oscy]

Educational, but the narrator speaks really strangely...

[danielhjackson]

Excellent job.

[ReservationAtDorsia9]

thanks for the video.

[MrSk8terboyz]

nice vid i didnt understand tho :P

[EedDeryi]

Jesus the narrator has the most patronising voice ever. But good video, thanks.

[policydynamics]

Pretty interesting -- especially the part that referred to ice ages.Bbut that was only mentioned in passing, and thus hard to get a handle on . You should make a new video just focusing on what causes ice ages. It probably would generate a lot of interest, given the record cold temps of late.

[XxLunaWhisperxX]

This is very good, thankyou :)

[1965ace]

I doubt the global warming nuts take this in to effect.

[therockhopper]

Couldn't be better.

[movieman0222]

Thanks

[hazairi]

nice video!

bravo!

[767Captain]

There is an ongoing argument with an ignoramus who says that all science points to a geocentric model of the Universe. I've posted this video on the other forum, where we're discussing it. Can't wait to see the response! Likely, it'll just be another variation of fundamentalist Bible BS.

[intruder313]

They probably still believe the Earth is flat too.

[ANewNormalcy]

As I watch all of these variations, one thought keeps going through my mind...

Your job: navigate spacecraft accurately and predictably.

[deyfuck]

@ANewNormalcy I was thinking that too, but then I realised that spacecraft would probably have information of this type coded in to their computer software, requiring very little input from humans (that is, if computers and humans are still separate).

[Puchicas9]

Thanks for the informative video!

[etreyu05]

i would not recommend asking people that, u might get punched in the face.

[lasertuber]

Great video. Maybe Al Gore could use this info to invent an Orbital cap and trade tax to stop climate change. Seriously though, why is the earth's tilt cycle is so closely aligned to the orbital cycle? Is there a reason for it, or just coincidence?

[cassiopeiaproject]

which orbital cycle are you referring to?

[lasertuber]

The earth cycles around the sun in approximately 365 days, and the earth also takes 365 days to return to its tilt position. Maybe I am missing something, but I believe the video pointed out a 1-hour difference in those cycles. Why do they coincide so closely in the first place?

[lasertuber]

Doh, nevernmind. I see that the earth maintains its tilt constantly now. Its the movement around the sun that directs the sunlight to the different hemisheres. Great video, thanks!

[c4a9p30]

@lasertuber

The earth's tilt doesn't actually change significantly over the period of a year- that would require a massive infusion of angular momentum at regular intervals. The precession (gradual wobbling of the tilt axis, a la the wobbling of a spinning top as it loses angular momentum) has a period of 26,000 years, as said in the video. So over the course of 26,000 years, the length of the seasons change relative to one another. Not noticeable in recorded history, needless to say.

[c4a9p30]

@lasertuber

@lasertuber

The earth's tilt doesn't actually change significantly over the period of a year- that would require a massive infusion of angular momentum at regular intervals. The precession (gradual wobbling of the tilt axis, a la the wobbling of a spinning top as it loses angular momentum) has a period of 26,000 years, as said in the video. So over the course of 26,000 years, the length of the seasons change slightly relative to one another. (Not noticeable in recorded history.)

[AutodidacticPhd]

I couldn't help thinking about Newton giving up trying to calculate the interaction of all the gravitationally significant bodies in the solar system. It might help if I knew how much of these eccentricities were known at the time, but a guess based on some of the language he used to describe planetary motion in what I have read suggests he was assuming a geometrically perfect arrangement, with little or no change in orbital path, inclination or axial tilt.

[lynchmobb2000]

I learned so many new things from this. Thank you.

[sofiasmartis]

i would like to see the numbers (and 'difficult' words) written, they are very hard even really percieve when they are just said.

especially when your mothers tongue is not english..

maybe you could even write it exponetial (aka "scientific") too..

good vid anyway

[AlanKey86]

Great comment - I completely agree. It would be good to have the words like "annila" (???) pop up on screen.

Great video thogh.

[Johannwyss82]

Check the tags for the "Difficult words"

[cassiopeiaproject]

Transcripts to all our videos are available from ITunesU.  Visit our web site to find out details on how to find us on ITunes.

[sofiasmartis]

that doesn't work for me, since there is no iTunes for linux.. (besides that i personally dislike iTunes' proprietary policy)

an podcast-feed with the vids and transcripts in it would be great! i would like to help with this. check your mail :) .

[Iwanthax]

cool stuff