天體物理學和宇宙學
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Understanding how the world works at scale, and its origins is essential in becoming masters of our destiny, and doing it right in the grand scheme of things. Namely, we don't know what we're up against here -- what made the universe originate, and we're not sure how it works exactly, knowing which would potentially empower us to change how it works, and use its laws for improving it. Astrophysics and cosmology can help us arrive at these and other answers.
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子分類：
廣義相對論與量子宇宙學.
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想法 Bio-evolutionary Hypothesis for Absence of Green or Purple Stars
Take the evolutionary approach, and explain it by narrow spectra of survival-critical (evolutionarilyy rewarding) plants spectra due to narrow-spectrum chlorophyll and retinal.
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外星球有太多可能，所以要研究？
外星球有太多可能，所以要研究？
[尹與及]，我認爲是因爲影響更大。有很多世界可能會影響我們對生命和多樣性可能性的估計，但是天體物理學和宇宙學都暗示了物理定律，正在研究這些定律的起源。
[尹與及], I think it's because of grander implications. Having many worlds may affect our estimates for the probability of life and diversity out there, but both astrophysics and cosmology allude to the laws of physics, studying which we are approaching to the answers about their origins.
物理定律會不會在不同的宇宙是不同的？那麼我們以地球的物理學如何能夠發現這些不同？現在有沒有發現這些不同呢？確實是令人有探索興趣的方面。
// 物理定律會不會在不同的宇宙是不同的？
有可能這個說話需要另外分類，叫 Metaphysics / 形而上學？我們在 Everything List 討論關於這些事。
// 物理定律會不會在不同的宇宙是不同的？
有可能這個說話需要另外分類，叫 Metaphysics / 形而上學？我們在 Everything List 討論關於這些事。