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'A Universe From Nothing' by Lawrence Krauss, AAI 2009

Richard Dawkins Foundation for Reason & ScienceYouTube ↗

Further reading 1

What becomes visible when you change representation? →An average, a spectrum and a geometric diagram each foreground a different structure. Before asking which view is intuitive, ask which comparison you need it to support.This video helps answer · When does brightness need a reference?

Caption notes

Krauss starts with the distance axis of a Hubble plot. Redshift and apparent brightness can be observed; inferring distance from brightness also requires a model of intrinsic luminosity. He uses exploding stars to explain why calibrating that scale matters to an expansion estimate.

Archived captions (transcription method unspecified) ↗
Original passages · 2
a standard candle something whose intrinsic brightness we understand
'A Universe From Nothing' by Lawrence Krauss, AAI 2009 · ▶ 14:06–14:13
these exploding stars are great standard candles
'A Universe From Nothing' by Lawrence Krauss, AAI 2009 · ▶ 17:34–17:40

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