Spectroscopy of Stars – Wonders of the Universe: Stardust – BBC Two

Spectroscopy of Stars – Wonders of the Universe: Stardust – BBC Two

our only contact with the distant stars is their lights that’s journeyed across the universe to reach us and Encoded in that light is the key to understanding what the universe is made of and it’s all down to a particular property Of the chemical elements you see when you heat the elements when you […]

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Do you really understand Einstein’s theory of relativity? – BBC News

Do you really understand Einstein’s theory of relativity? – BBC News

Albert Einstein’s theory of general relativity completely changed the notion of the Universe. It shed light on the birth of the universe, planetary orbits and black holes. It also has very practical uses, like in GPS navigation. But what exactly is this theory and why was it so revolutionary? Until the early 20th Century, physics […]

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The Fermi Paradox — Where Are All The Aliens? (1/2)

The Fermi Paradox — Where Are All The Aliens? (1/2)

Are we the only living things in the entire universe? The observable universe is about 90 billion light years in diameter. There are at least one hundred billion galaxies, each with one hundred to one thousand billion stars. Recently, we’ve learned that planets are very common too. And, there are probably trillions and trillions of […]

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