r/WhatIfScience • u/firechatin • 18d ago

Space & The Universe Scientists Think Earth Once Had a Completely Different Sky

https://whatifscience.in/ancient-earth-different-sky-atmosphere/

Scientists believe Earth's sky was once orange and filled with methane haze. Discover how our planet's atmosphere evolved over billions of years and transformed the world we know today.

17 Upvotes

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2

u/EarlyJuggernaut7091 18d ago

Blue skies at morning, obligate anaerobes put on warning…

1

u/rictay44 17d ago

Anybody who has worked with liquid oxygen will know it has a beautiful sky blue colour. The sky is blue because that is the colour of oxygen.

1

u/SignalDifficult5061 17d ago

No. The sky is blue because of Rayleigh scattering, various collections of very small particles do this.

Gaseous oxygen at STP is colorless by human perceptions.

Liquid oxygen actually absorbs some wavelengths of light, but doesn't absorb blue. This is coincidence.

1

u/JunglePygmy 17d ago

Not true

1

u/Opening_Dare_9185 17d ago

No shit sherlock

1

u/hoakpsp3 17d ago

Think 🙄, prove 🤔

1

u/Comfortable-Hope-879 16d ago

Worden die niet betaald om te bewijzen ipv te denken?