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What does “scientific consensus” mean? (Synopsis)
“Those who know that the consensus of many centuries has sanctioned the conception that the earth remains at rest in the middle of the heavens as its center, would, I reflected, regard it as an insane pronouncement if I made the opposite assertion that the earth moves.” –Nicolaus Copernicus There are certain words that simply…
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Water Vapor Could Have Been Abundant in Early Universe, Scientists Say
Water vapor could have been just as abundant in cosmic molecular clouds a billion years after the Big Bang as it is today, says a group of researchers led by Dr Avi Loeb of the Harvard-Smithsonian Center for Astrophysics. Dr Loeb and his colleagues examined the chemical reactions that could lead to the formation of [...]
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When Did the Universe Flood With Water?
By studying ancient molecular clouds in our galaxy, astronomers have revealed that the universe's reservoir of water likely appeared much earlier than thought -- only a billion years after the Big Bang.
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Ask Ethan #85: Hubble vs. The Big Bang (Synopsis)
“Silently, one by one, in the infinite meadows of heaven, Blossomed the lovely stars, the forget-me-nots of the angels.” -Longfellow The cosmic microwave background is a thing of beauty, as not only does its uniform, cold temperature reveal a hot, dense past that began with the hot Big Bang, but its fluctuations reveal a pattern…
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The Universe Is Not Expanding As Rapidly As Previously Thought
One of the biggest questions to date pertains to the expansion of the universe since the “Big Bang”. While some believe the universe is expanding rapidly, still others think the universe is moving outward at a much slower pace. Which idea is correct? Fast or slow The … READ MORE
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Mysterious 'Cold Spot': Fingerprint of Largest Structure in the Universe?
An explanation of the CMB Cold Spot may have been found and it could be caused by the biggest structure in the known universe.
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La cosmologia nel 21° secolo
Come è nato l’Universo? Qual è la causa della sua espansione accelerata? Che cos’è la materia scura? Queste sono solo alcune delle grandi domande a cui fisici e astronomi stanno tentando di dare una risposta grazie all’ausilio di strumenti sempre più avanzati. In questo video, che fa parte di una serie di seminari pubblici organizzati … Continue reading La cosmologia nel 21° secolo →
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Ask Ethan #84: Where did light first come from? (Synopsis)
“Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it.” -Terry Pratchett If you want, you can imagine back in the Universe to a time before it looked anything like ours did. Before there…

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