Tides: Crash Course Astronomy #8

Today Phil explores the world of tides! What is the relationship between tides and gravity? How do planets and their moons become tidally locked? What would happen if you were 300km tall? Important questions.

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Chapters:
Introduction 00:00
Gravity Over Distance 0:44
Tidal Force Parameters 1:35
Battle of the Bulges 2:55
High and Low Tides 3:47
Push & Pull 4:51
Tidal Lock 6:07
Sun Tides 6:58
Review 8:51
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PHOTO/VIDEO CREDITS
Photo & video credit: "NASA's Scientific Visualization Studio"

[headrockbeats]

I'll say it every time - this is my favorite Crash Course, and Phil Plait is absolutely fantastic at this.

[sheepwshotguns]

"tide go in, tide go out. you cant explain that."
~bill o'reilly

i love that he'll never live this down

[taraponkongjampee]

His accent and his phases of speaking is really clear. It's easy to understand without subtitle. Thank you for uploading these videos. I can't imagine how am i gonna survive through the semester without this channel.

[Woodenfan]

Yeah, this is my favorite topic of CC Astronomy so far. 

I was forever wondering how the moon affected tides. Thanks, Phil, for making it simple to understand (to an extent, I'll need to watch this again) and entertaining! 

[nunnner]

If anyone is ever in Nova Scotia, watching the tides come in the subenacadie river is amazing. It's close to the hopewell rocks shown in this video. All of this is in the bay of fundy. Highest tides in the world! Tidal bore rafting is a blast too!

[Graser]

"Tide goes in, tide goes out. Turns out I can explain that."
-Phil Platt

Greatest moment in Crash Course Astronomy so far.

[semiflaccid]

This just blows my mind. So many forces at work yet most people have no idea. Loving this series. 

[AquaWeringerong]

And of course I'm watching this because I enjoyed a lovely spring tide on the reef today and live on the coast. You guys rock.

[fernandoschuindt]

I'm re-watching this series 2x or 3x per episode, let me tell ya, I love this shit.

[susanne]

2022: In my opinion still the best video on tides. Thank you very much!

[kzenias]

Maybe I'm dumb but I've watched this at least 8 times in the past 4 years and I still don't understand

[DuranmanX]

all this gravity talk is weighing me down

[aTTypical]

Thank you so much for explaining this! I've seriously been trying to work it all out on and off for a few years now. The pattern of tides and the moon's effect on the Earth were two mysteries I wanted to solve, and now I see they have one answer. You explained it perfectly :D I'm so thrilled to finally get it!

[Dhani_Nerrh]

Great, for the first time I could actually understand (and accept) that there is one portion of the moon that is never facing the Earth, though is not really dark, we just can't see it from here. Well done, thanks a lot, mate.

[swsephy]

Fantastic video. It's like "tide" isn't even a word anymore.

[RDeathmark]

My favorite answer to the question of what's up? Is up is the abstract concept of the direction opposite the nearest greatest force of gravity

[Feoremar]

Great jab at Bill there, I was really looking forward to one and you didn't disappoint! :D

[douglascimon]

I have been (admittedly casually) looking for an explanation that put the acceleration in it's orbit, and the consequent increase in the distance between the moon and the earth, for a long... LONG time. Thank you for this video, I'm so happy to have found it.

[Teddyshjorne]

Thank you for using the metric system when explaining!

[Nicohugga]

I learned on another video that it doesn't stretch it squeezes and it's actually the combined effect of all those small tidal forces together that raise the water pressure overall and cause the tidal bulges. I saw that in another PBS video.