Star Clusters: Crash Course Astronomy #35

Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster. There are different kinds of clusters, though. Open clusters contain hundreds or thousands of stars held together by gravity. They’re young and evaporate over time, their stars let loose to roam space freely. Globular clusters, on the other hand, are larger, have hundreds of thousands of stars, and are more spherical. They’re very old, a significant fraction of the age of the Universe itself, and that means their stars have less heavy elements in them, are redder, and probably don’t have planets (though we’re not really sure).

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Chapters:
Introduction: Star Clusters 00:00
Determining the Age of Star Clusters 2:04
Open Clusters Evaporate 3:23
The Pleiades Star Cluster 4:27
Globular Clusters 5:50
Review 9:25

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PHOTOS/VIDEOS

[Shirokroete]

I just realized, this video series entertains me for months now and I never did anything for appreciation.

Now, I just wanted to say thank you for this video series. Always when I felt down I was happy to see there's another Crash Course Astronomy episode out. The host is a really likable personality and it's uplifting to see him talk about his passion.

[nathanbickel]

Is anyone else just interested in astronomy and binge watching this?

[PeterFrikadelle]

Thank you wonderful people at Crash Course Astronomy for educating/entertaining me. That is all.

[deadasfak]

Moral of the story? You can't live without heavy metal.

[JuampaXXI]

I love how they give credit to the team by speaking, instead of just throwing a bunch of names to the screen

[landenmoudy]

These types of videos are always fascinating to watch. There is so much to learn about the cosmos in such a tiny life span we have.

[GarlicToastOooo]

WOW that was perfect timing.
just finished watching the last ep.

[jebuskryst]

"What do you call it when stars cluster."

The Oscers?

[Straightarrow]

Fun fact everybody the Seven Sisters are Subarus car logo sign👍

[nuclearmango]

This is by far my most fav crash course.. thank you for such an amazing journey..

[ejdzentigl]

In my mind, this series is divided into some arcs and there will be more:

Arc about basics (whatbis astronomy, gravity, tides, equipment for astronomy, etc...)
Solar system arc (Sun, planets, asteroids, comets and meteors, but also those moons, clouds and other stuff)
Current star arc (Stars and everything about stars, their shapes, sizes, coloures and even death forms)
Now i think there will be something about galaxies then about big bang and then, like you said in episode 1., eventual fate of universe itself. But you know the future of your series, it's great.

[Yojack]

Is the topic, "Quasar" coming anytime soon?

[time]

Absolutely LOVE this series and the posts on Slate. One question: if open clusters are so short lived, why aren't they all gone by now. In other words, there must be a mechanism by which they are continually newly formed - yes?

[gliansimpel]

Thank you so much for this. Reason why I opened this? Job 38: 31; Job 9:9 mentioned Bear, Orion, Pleiades! And I’m into tears realizing how beautiful the creations are & above all how great the CREATOR is!!!

[Piffsnow]

Damn ! I was totally unaware of all that stuff.
Thanks for making me a little less dumb everytime. :)

[godofthedesecrated]

This series couldn't have come at a better time, in my humble opinion that is. Any time would have been great but with all the discovers and new knowledge we've gleaned since Hubble was launched and now with the Kepler finding new objects seemingly everyday I think the timing was superb. Once the James Webb gets into service I believe it will open our minds to things we could never have dreamed of. Thanks for putting this together, it's been awesome so far!

[ArturLoss]

This is the best show on youtube. Thank you!

[robert_wigh]

Thank you very much for making this video, Phil Plait, Aransda, Thaller, Sweeny and all the others at _Crash Course_ Astronomy! It was really interesting to hear you comparing globular clusters to open, galactic clusters. I actually had no idea what the word ‘globular’ meant before looking it up after this episode. Personally, I do prefer more tightly packed globular clusters over open clusters. Anyway, keep looking at the stars! Thank you for this video!

[CamiloSantana]

i regret that I only have one, "like" to give this video. thank you for your speed and efficacy. such rich content.

[bxundxm]

7:10 It's hard to believe something that full of light and energy, that even looks like a city shining in the dark, isn't alive somehow.