This was great. The lady really knew her stuff and presented it in a wonderful way. Thank you to both you (Brady) and her.

This makes me realize how beautiful Earth really is.

Probably my best spent 11 minutes ever on the internet. Thank you Brady.

@aMondia yes, I occasionally ask for help on Twitter and Facebook!!! Thanks to everyone who helped!

This is so amazing and well explained, that I watched the whole video

@themightychickens glad you enjoyed it... thanks the astronomers, not me! :)

probably one of the best youtube videos ive ever watched

She pronounces everything so delicately. Its very nice to listen to.

I've been watching sixty symbols vids for the last couple days and I have to admit, I am SO, so so so in love with her

Very interesting video. Thank you !! Maybe the young man could talk a little bit slower? ;-) I found it difficult to understand all he was saying, since english is not my mothers language.

Thanks so much for uploading the video.❤️

Been subscribed to Sixty symbols for I don't know how long.

Kind of distracted bt the atlas of creation in the back

VSAUCE?

10:01 Aaaahhh!! What kind of transition was that. You almost made my head explode.

whoa......lots of information.......11 minutes to understand it all..... This is better than school!!! Subbed!

What would life b like if the earth wasn't tilted? That would be a great video

This pretty much proves that the Earth isn't flat.

Vsauce and Sixtysymbols - some of my favorite things merging together. Amazing.

these kind of videos need millions of views these actually teach you something.

hopefully i marry a lady as pretty and intelligent as she is.

This piece of knowledge had always been a dark spot on my mindscape, even though it's more relatable than most other science topics. Well, now i do. Thanks sixtysymbols!

Shut up. I was subscribed to this channel way before vsause. this is probably the most educational 11 minute video on youtube!

lovely video as always! thank you brady for your effort

this is the best explanation on the internet

Excellent presentation . Thank you!!!

great video, very entertaining and informative.

I watched it all, i didnt realise how long it is. interesting stuff

Celestial Mechanics perfectly explained, no equations, no tricky software, just pure intention of making this as simple as possible but comprehensive. Thank you.

Amazing video!! Thank you so much, from Mexico!

nice work !!

I just loooove the way she explains things; just love her!!!

Getting in a few days early because I am away for the solstice itself!!!

thats so interesting!! i love this!!! i thought it would be boring! but i loooove it!

Geez why is everyone trashing this video x.x..if you dont like it, lean "forward" and change it! Some of us actually enjoy this and dont really care whether or not you "learned this back in kindergarten"

this was a really great video soo informative great work guys

Her voice is so soothing!

Not only is she beautiful on the outside, she's knowledgeable too. All the professors in the videos are a joy to listen to.

Yay for using Stellarium! I use it all the time when I'm gonna get out my telescope :)

@paloskie gracias! Luckily i got VLC installed and will give it a go this weekend.

@kid181 That effect is actually negligible in comparison. The difference in distance is only about 2%, not making for a large change in sun radiation (about 4 percent). And on the south half of the earth, this effect actually goes opposite the seasons, not to a noticeable effect (further away in warm season, closer in cold).

I know Nottingham very well. My Moms sister resided in Mansfield. I recall as a child picking Blackberries and Mushrooms in Sherwood Forrest. Decades ago. They are now deceased, I miss my cousins, as we are now older than our aunts and uncles were when we we kids. I recall rushing for that Shilling to place in the Meter as the Electricity went off.

And now I just wanna go and watch Sagan all over again.

@paloskie but I'd like to add it to the video here for everyone!

holy crap this is amazing.

@busterbox I'm pretty sure this is "Stellarium". It's open source and available for most operating systems. Haven't tried it in a long time though.

@eduveloper email me via the sixty symbols website... there is a way.

those romans are geniouses. Ive been suntanning for years and never noticed the solstice.

I wish this woman was my Geography teacher or something.. it's so easy to listen to her talk. I'm sure my Geography teacher was saying something along those lines once, but she somehow makes it seem more interesting :D

Never thought I would watch the whole video!

@carbronica "I've always wondered why theCoulomb wouldn't therefore be the base unit instead." It is. It just seems to be convention that sometimes we like to used derived units like Amps instead of Coulombs per second while other times, like with velocity, we are happy to talk in meters per second or miles per hour without feeling the need for a new unit.

Thank you thank you thank you. I've always wonder about solstice.

Great calculation for that that guy in egypt; just brilliant!

@yuGremaL Stellarium, you can see the link at 00:35 in the video. This software is free, and offers much more features then presented in the video.

This is fascinating. o_o I want to learn more!

this is the best one.

This is a really cool thing I've never really thought of. The program really helped with getting the point across. One more thing in life explained =]

Agreed, I came here to say the same thing, she has such a lovely and calming voice. Also, that software is really cool. I wonder what it's called. (Haven't finished the video yet)

How nice of the viewers to send in pictures you can use. ;D

Thanks for the info! I've been wondering what software this is... I'm going to look it up now.

Minor corrections: She pronounces the word "analemna". It is "analemma". Later, when describing the motion of the sun around the polar sky, the presenter uses the verb "rotates". The sun actually appears to "revolve" around the north pole.

Does the Sun rise due East in Antarctica at the equinox?

@pkwithobby yep thats why it had stone henge at the beginning

@buzzimu I dont know what is it. Same happened to me. I think its her voice. So calm and pleasing

The programme she is using is called "Stellarium" if anyone wanted to know ^^

@carbronica Crumbs yes! Now that I've looked at it I think I was somewhat perplexed by this many years ago but have since decided to forget all about it. The base unit definition of an ampere does look suspiciously derived to me but from the meter and the kg not the Coulomb. Interesting to note the proposal to define it in terms of Coulombs in the future, with a new definition for Coulombs.

I love her mixed accent, great to listen to :)

@sixtysymbols I've always been interested in solar movement. Great video. Can you do a video on the Higgs Boson?

Excellent Leanback.

Stonehenge as a solstice calendar. Well, that IS pretty cool. But I thought it was an intergalactic marker for a large black and green puzzle box called the Pandorica?

@lnwreal9 This only happens for like 20-30 days out of the year, it is not year round. also there is also like 20-30 days of night as well at least thats what i think

Uranus has a tilt that is nearly pointed directly at the sun (almost a 90 degree angle). You should look it up!

Where was the photo at 9:20 taken? It is interesting how it has "Ráktérítő" written on it in Hungarian.

@justroosa yeah we learn these things in highschool too here in Belgium

If you wanted to download the program she was using it is called Stelarium and its free.

One question,(1:55 - 2:52) That also explains (in part) why there isn't summer time in the countries that are under the ecuatorial line?

That is one nice mac you've got there.

@denemigen thanks!

Thanks so much for the video! :) I learned a lot! :)

Knew all of this from living my whole life on the arctic circle with every summer having the midnight sun.

The name of the software is stellarium (Mac) and its free to download

By the way guys the software she uses is free and is called "Stellarium", available on mac, pc, linux, and many mobile platforms.

@Zenziba95 thanks!

btw thats stellarium if anyone wonders what program that is.

@XxFairyGrrlxX If you're talking about the date at the beginning that wasn't the actual day. She plays with the date throughout the entire video, that's how she gets it where she wants it. She started on the 21st because that's the summer solstice.

You're very right.

@TomMarAlem1987 What happens exactly? If a photon has specific wavelength, a wavelength small enough, so that its energy is big enough, it will give enough energy to a electron to overcome the energy gap in between atom orbits. U may have some Compton scattering involved, but that is a wide very wide subject.

Turn on captions at 10:24

Well, this is a year's worth of mind blow. Yeah, baby.

That's pretty awesome

brady! another amazing video.! What is the name of the software she is using?

@eordogadam The same picture is used in Wikipedia's article on the Tropic of Cancer.

Could someone please point me to the original file(s) for 10:19 - 10:46, of Earth rotating?

Very cool.

This channel deserves the attention Vsauce is giving it !

To understand the seasons, I suggest using a torch an apple and a pencil. (To put through the apple.)

That's rather impressive software you've got there. What's it called? Any idea how it works?

I am a greek astronomer 2000 years after Eratosthenes , Ptolemeus and Hipparchus and I approve this video on behalf of my ancestors.

@BomberEffect not recorded on june 26th. she just set the date on the computer to show the sun on that date

Could you do a video on boiling points? Why water boils faster on lower pressure etc and generally what causes solid, liquid and gas state :D