Spectroscopy of Stars - Wonders of the Universe: Stardust - BBC Two

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Professor Brian Cox demonstrates how we can understand what the entire Universe is made of by looking at the faint light emitted from the stars.
#bbc
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[@internetlurker4329]

Who else is here in quarantine from online science class?

[@alisabbouri2933]

chem*

[@Gabe_Sert]

yo I am

[@sameerc7277]

@@Gabe_Sert Thanks gabe

[@Brahze]

Astronomy 120 gang

[@wrenv3947]

Chem sent me here

[@JennySussex]

92 elements found on earth same as in the whole of our universe! Mind blowingly fascinating! Brian Cox presents these programmes in a way that his passion for his subject ignites a passion in me to want to know and learn more

[@avikmondal9584]

If this is the recommendation, you are in right path.

[@ultrakool]

loved this guy in braveheart as uncle argyle

[@uttarakannadiga]

thank you Dr. Brain Cox

[@HidingInFantasy]

yay flame tests :) I totally did that on open day at school for like 3 hours :)

[@badmoonrisin4700]

My favorite bit was when he burned the lithium and copper.

[@meetaverma8372]

That copper blue is beautiful

[@zussly]

me encanto tooodo de este doc, muy interesante o de los colores...

[@MrGamemaker8]

This is some great YTP material here. Thanks, mate!

[@meetaverma8372]

I wanna see that 👀👀

[@MrGamemaker8]

@@meetaverma8372 I don't know what about this video made me say that

[@meetaverma8372]

@@MrGamemaker8maybe it was the colourful fires

[@Barbreck1]

What he failed to point out is that while the absorption lines do indeed show what elements are present in the Sun's atmosphere, they're displayed upon the background of a full spectrum. Meaning the sun itself is generating light in every wavelength... Pure white light. This is significant because it determines that the sun itself is not a gas. It MUST be constructed of condensed matter. Y'see, when light refracts through a gas, it generates a spectrum that is dominated by distinct peaks of light, as the elemental present emit light in only very specific wavelengths. But condensed matter produces a full spectrum - a spectrum that displays a full band of light emission... Not just peaks. Therefore, if the body of the sun was a gaseous plasma, as proclaimed by proponents of the standard solar model, then the spectrum shown by Cox in this video would be impossible, as the gas would be producing light at the same wavelengths as the atmospheric gases absorbing them! But the fact these gaps exist on a solid background full spectrum determines conclusively that the sun is a liquid body containing everything element.

[@JPO1618]

@emikochan13 Cool. I had only heard the story of its discovery and didn't realize it could be up to 7% the volume of natural gas. Thanks, I love learning.

[@frankieroandMCR]

This is incredible!

[@user-st2bt4ws2v]

i love u mcr

[@Matt-li5is]

Flame test but not using Bunsen burner (non-luminous flame)

[@TheMaverickanupam]

One question-Doesn't the light change color depending on the distance of the star due to the change in wavelength. For example stars that are closer have blue light whereas stars farthest have red light when it reaches us. Since the light changes color how do we know the same color as was emitted is received on earth?

[@TacoCatCube]

Because the distance between the gaps is the same. This is how we can determine how much blue/red shift a star has.

[@captain_meerkat1901]

Also because the stars he mentioned are in our galaxy, and they aren’t being red or blue shifter. Only affects objects outside the Local group

[@shivamduhan7700]

important to note that red shift or blue shift is because of relative velocities, not distance.

[@Sam-jb7sh]

James Blunt knows a lot about stars lol

[@deannelson9565]

Ironically this guy used to be in a pop band that got fairly famous back in the 80's.

[@emikochan13]

@JPO1618 No problem ^_^ I work with helium xD

[@Bshaikh]

Anyone know the track name of music at the end?

[@omglolgiraffe]

correct me if I'm wrong but isn't technetium a synthetic element that isn't really found n nature (so there is 91 natural elements)

[@oliver9301]

What does the emission spectra fro the star reveal tho????

[@yikesQuakes]

Which elements make up its atmosphere

[@user-kf8sl7kb9e]

Copper compounds emit Green Brian... I have been doing this for 30 years in Chemistry classes...

[@infinityeconomicsinfinitye2040]

💐🙏

[@jordanlauquan]

hi souhegan

[@emikochan13]

@JPO1618 helium is found on earth, distilled from natural gas.

[@JPO1618]

Shouldn't it be 91 elements found on earth and helium?

[@irfanhasanswarna5798]

❤

[@dylanrees2966]

who else is using this for A level physics

[@donnalizsanchez8352]

try freshman environmental science lol

[@conandenz8413]

A level physics too! Nice.

[@forces7293]

quarantine squad

[@camerontheberge8385]

How do elements 93+ form?

[@1230986666]

Amazon Prime

[@shivamduhan7700]

they dont occur naturally, and are not stable. you need atomic collisions and alpha particle strikes in high energy configs.

[@anandchellappa1316]

super yo...its different to me...

[@julyjuju3700]

teatre de chez nous

[@healslime5411]

Dr. Stone reference

[@CaptainAndMolly]

hi!!!!!!!!

[@user-sz5vx8lz9f]

Вот откуда человеческое недомыслие Земное! Огонь и пламя прародитель/ На Звёздах Ген перегорел. Набор Геномный/как носитель/ Вот и остался не у дел!

[@nickwelty1751]

Why does this guy scare me so much

[@meetaverma8372]

He's great, why would you be scared of him?

[@dirtyub]

who else is here from keating

[@calvindagolden]

he's actually married and has kids lol

[@Id1ot_wh0re]

RAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH fire so pretty :3