Cosmology: twinkle twinkle little cepheid variable... young earth?

First off, I have no idea why the motion quality is so bad on the film, I'll check my hardware settings to see if there are any driver issues.

Second, the science:
Cepheids do play a vital part as 'standard candles' in determining the size of the Universe, but the details of their variations are not well understood.
Dr Penny said, "One hundred years ago Polaris varied by 10%, but over the last century the variations became smaller and smaller until ten years ago it only varied by 2%.

"The precision of distance measurements based on the period-luminosity relation depends primarily on the precision with which the distance of some Cepheid is known."

"[Polaris] has a period of 3.9696 days and varies .1 magnitudes in brightness, which is imperceptible by the human eye. Its period (and average luminosity, and the magnitude of its variation) have also changed substantially during the time they have been measured; this is unusual behavior for a Cepheid."

"The Cepheid variables are now divided into two subclasses, Population I or classical Cepheids, which are young, massive, metal-rich stars, and Population II or W Virginis Cepheids, which are older, fainter, metal-poor low-mass stars.[14] Population I and Population II Cepheids follow different period-luminosity relationships."

Hmmm, right, so what happens if there is a third category
of Cepheids that we don't know about that have different period-luminosity relationships again?

Category:

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Tags:

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• young earth
• old earth
• stellar evolution
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• astronomy
• distance
• light
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[winterstellar]

I'm listening to music on another headset now, but based on the comments I read here I'm guessing that the tard talking in the video is an american hick. Personally I live in on of the very most secular countries on the planet(and according to wiki the best country in the world to live in), and in my country I think the last fundies died decades ago. Even the two percent church-goers we have(again according to wiki) in my country accept modern science.But how the fuck did I get here, anyway?Bye!

[perfacetus]

@winterstellar

Best not to comment if you can't hear the person talking. I am most definitely not a hick, neither am I American. I am British.

I accept modern science, if I didn't, I wouldn't be using it to disprove certain accepted concepts.

[winterstellar]

@perfacetus Okay. Sorry for being a bit prejudiced there. I had encountered a few anti-scientific christians on YouTube that day. Cheers.

[perfacetus]

@winterstellar

No worries, we all have bad days!

God bless.

[winterstellar]

@winterstellar I was watching a serious science video on cepheid variables. That was how I accidentally ended up here. Damn, I must learn to be careful with what I click on! Because this was almost like accidentally hitting an animal abuse video or "2 girls, one cup" or something. Seriously, Winter! : (

[APDurrant]

@perfacetus

Because humanity foolishly values false certainty over honest doubt?

Admitting you don't know is a major problem for the religious and PhD's :) And, If I'm honest, most everyone dosn't like to admit that they don't know, and probably won't in our life time.

[APDurrant]

@perfacetus

Fair enough, I await improvements in technology to allow us to do so.

[perfacetus]

Well shall we put it this way:

the evidence I have for Christianity was written 2000 years ago (the Judeo part even longer than that) at it is still valid to me today.

Science, while respectable, admiable and generally desirable changes its mind every five minutes, so I know why one seems more logical as a basis for things eternal.

[perfacetus]

Apparently the distances are too small for us to measure, visible light or not! Sorry I don't make the rules!

[APDurrant]

@perfacetus

In your 2nd paragraph, essentially, you are making pascal's wager. Which is bollocks. Without any evidence you can know nothing of god or gods, which god or gods you should pick, or what they want you to do or not do, so why should be have any basis for belief?

What on earth do you mean by a religious context? The Mythology of my desert Dwelling ancestors? The search for philosophical truth's? an Avoidance of reality?