Earth's Tilt 1: The Reason for the Seasons

How can it be summer in North America and winter in Australia at the same time?!

License: Creative Commons BY-NC-SA

[ivandankob]

I hope everyone who participated making this video are fine and dandy 10 years afterwards!
It was a pleasure to watch & learn ;)

[gangadharr]

Seriously, this is one of the best explained videos of this topic...Thanks MIT

[YaBuddyC]

This is the absolute best and clearest to visualize and understand explanation on this that you could ever watch. Thanks!

[BMac]

Had to watch this for a science assignment gang
↓

[YanTales]

I unironically didn't know this and I'm 30. Very nice explanation. Also explains why equatorial places remain warm throughout the year.

[reeltv]

Dude my whole 30 years of existence I had no idea about this. I thought the whole world was winter and summer at the same time. This is fascinating. I still have so much to learn.

[janvipabari]

I cannot stress how glad I am that I found this video. It explains things so well!! Thank you for making it

[doodelay]

"And there's so much more to talk about, did you know that the earth-"
"Ya know, I actually think I'm good for now."
Nailed it 😂😂

[EdGloss]

I use a flashlight to explain the seasons to my students as well. This is something that while some people will understand from a written explanation, the majority of people will need something visual to really fully grasp it. So I explain it verbally and then demonstrate the concept with a flashlight and I suddenly hear one student after another say "oh, now I get it." It's great.

[yolisabeauchamp]

I'm 28 years and I didn't know that the angle was responsible...yikes. Thank you for the video

[merkinatorz]

I'm 48 years old, and despite reading many books and watching many videos and knowing it was the tilt that caused the seasons, I was unable to visualise it properly in my head until seeing this video. I think it was the bit where you moved the Earth from one side to the other - I was always trying to visualise the Earth rotating as it orbited the Sun, and mentally I couldn't sustain the correct tilt as I did that. This model solved that for me. Thanks!

[beefbuttons]

The axis does actually wiggle around a little in two different ways it just takes along time to do it, The axis varies from an approx. minimum tilt of 21.5 deg. to 24.5 deg. over a 41, 000 year period. The second is axial precession the movement of the rotational axis of an astronomical body, whereby the axis slowly traces out a cone, Earth goes through one complete precessional cycle in a period of approx. 26, 000 years or 1deg. every 72 years, ATM the north star is Polaris, The north star has changed over the past 11, 000 years, and in another 11, 000 years it will switch back to Vega. The north star changes because of precession and is slightly influenced by the change in the angle of the Earth's tilt.

[MrFoofarew]

I’ve known about the tilt for forever but never knew about the spread out energy vs concentrated energy. I just assumed it was warmer because the tilted hemisphere was technically closer to the sun. But this makes way more sense. Thanks!

[hannahkatedando]

thank you for making this, easy to explain

[djnv]

Thanks for this, I had to watch a hundred videos on this subject before yours finally actually demonstrated it properly. Nice work!

[LG-lbsf]

Best explanation so far, it's that "lean in part" (how I choose to word it to understand it better lol) of the earth that gets the most direct sunlight making that area experience summer, the rest of the sunlight diffuses over the rest of the area making them experience winter, got it! :)

[---Kyle---]

I love Spring. Spring is the season of life.

No more the bare wands that told of winter's magic, here come the green flags, the parade of spring in bright bloom. The chorus of the skies has called forth the promise of the earth and sunshine combined. These weeks will be as a developing photograph - the colours deepening with the richness of the season.

The early morning sunlight, soft and diffuse, gives way to the first strong rays of the day, the ones that bring true warmth. In this light, water evaporates in slow waves, waves that eddy in the gentle breeze, flowing upward to white-puffed clouds, ships of white in the blue above. The opera from the trees becomes all the more powerful, as if these golden rays are their conductor's wand, and together they are the song that calls forth the spring.

There is a playfulness in nature, in the skies, woodland and soil. The time of plenty is coming and the joy of coming abundance energizes the air. In rain or shine, there is a new warmth, inviting the lips to smile. The greenness of the grass is soon to be echoed by the trees, while the flowers promise their rainbow garland to our Earth.

(Thanks for reading)

[manyoolo]

This is a perfect explanation on seasons of the year; thank you very much...
I will recommend the video to my student teachers, hope is free for using it in teaching and learning

[maggiewatson]

This video is by far the clearest and most charming version of this explanation I have seen. And you explain the science concepts so memorably. Perfect for our students--we watched it several times, thank you!

[flowderpowder]

Summer🥰
Summe😇
Summ🙂
Sum🤨
Su😒
S🙁
Sc😒
Sch😕
Scho☹️
Schoo😣
School😭