AS101 Chapters 1 and 2.docx - AS101 TEXTBOOK NOTES CERN...

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AS101 TEXTBOOK NOTES - CERN largest hadron collider, to simulate start of universe - Size of the electron ten billionth of a metre, the nucleus is 10000 times the size an atom, hadron collider can produce particles 10^-15, smallest possible the Planck length which is 100 billion times smaller than the smallest elementary particles. - VOV, every time we move 10m away, field of view becomes 10x10 larger than previous square. - Earth 13000km in diameter - Enlarge view by factor of 100 and see 1m km wide - Distance earth to sun 1.5x10^8km AKA 1AU (Venus to sun IE 0.7AU) SPIRAL ARMS - Long spiral patterns of bright stars, clusters, gas and dust. SUPERCLUSTER – a cluster of galaxy clusters - Space between stars filled with thin gas, those clouds give birth to new stars. (Sun 5b years ago) - Visible disk of our galaxy roughly 80000ly - Milky way larger than most galaxies but one of billions - Local group cluster of about a dozen galaxies which we are a part of. 1.2 TIME & CONCEPT - around 13.8 billion years since the big bang - milky way one of the oldest galaxies approximately 13 billion years CHAPTER 2 – THE STARS Asterism – named grouping of the stars that is not a recognized constellation Constellation – stellar patterns of stars, usually named by myologically gods or creatures.

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