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zakruti.com » Knowledge, science, education » Crash Course
Stars: Crash Course Astronomy #26

Stars: Crash Course Astronomy #26

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Rating: 4.0; Vote: 1
Today Phil-s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars- luminosity versus temperature, and most stars fall along the main sequence, where they live most of their lives
Date: 2022-04-04

Comments and reviews: 9


Hold up. let me nerd out for a second.
The ship on the right is the 2011 millennium falcon, that he BUILT WRONG.
The windshield piece on the front is upside down, and the side of the sjip that the cockpit is in front of, he is missing two 2 by 2 round tile piece's that both have stickers for detail on them.
God I'm such a nerd.

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After listening to all the details you put ahead on your video dear Phil, I started to wonder what happened with all this knowledge before humans appeared on earth and what will happen when humans will disappear the day an asteroid will smash all of us or probably when a nuclear war will bring us back to the stone age!
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I admit, when I was younger I used to believe every star I see on the night sky was just a small blob of gas somehow shining light and if we light them on fire, they'd burn
I was genuinely scared because I had favorite stars and I didn't want anyone to burn them

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If the stars light intensity were equal and snove that of the sun then the space would have become the hottest place on the entire universe or the entire universe would have become the hot hot hot hot. universe. especially the space.
The stars are cool, msn!

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Btw, why its still said that G class is yellow star?
Since its temperatur surface between 5. 000-6. 000K, according to blackbody radiation its should be white. Just as the sun in this video.
Is this clasification just said their appearance from earth?

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The sun is not a star, far from it. Their energy sources are vastly different. and no one has answered yet why the night sky is not ablaze with the sun's rays cascading tangentially past our planet from the other side where it is daylight
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Short answer: the Sun is technically a green star, but since we evolved on Earth, our eyes see that as white. This is why plants are green - they evolved to not absorb the harsh peaking wavelengths of the Sun-s light, that is, green.
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Im 68. Always wanted to know: what's happening at the geographical center of the sun? And jupiter? They say the center of earth is iron, but how possibly could anyone know for sure? I heard maybe a 5 milecwide ball of uranium.
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Question.
Do the spectrum of any star can tell us how much of iron are available? I know we can said which one, but how much.

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