Stellar Exam 1 Notes

Stellar Exam 1 Notes - THE STELLAR UNIVERSE: EXAM 1 Planets...

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THE STELLAR UNIVERSE: EXAM 1 Planets – “wandering stars” Mercury, Venus, Mars, Jupiter, Saturn, Sun, Moon ancient planets (because they move against the background of the stars) o 7 – The perfect number o 7 days in a week Sun’s Day -----------Sunday Moon’s Day --------Monday Tiv’s Day -----------Tuesday (G) Wodin’s Day -------Wednesday (G) Donar’s Day -------Thursday (G) Fria’s Day ----------Friday (G) Saturn’s Day -------Saturday Numerology – secret, hidden meaning behind numbers o 7 is a perfect number o 666 – to make superlative over “most beautiful,” you triple the word “Holy! Holy! Holy!” Since 7 is the perfect number, 6 is imperfect – tripling the 6 to make it the most imperfect Neron Caesar – persecuted the Christians; in Hebrew you don’t write consonants NRWN QSR = N = 50 Q = 100 R = 200 S = 60 W = 6 R = 200 N = 50 666 o Roman numerals to Arabic numerals XI x V = CV 21 x 5 = 105 Galaxy – collection of stars Milky Way – a galaxy; it’s diameter is 100,000 light-years Solar System – the sun and its planets Universe – all galaxies Cluster – a bunch of stars Halo – a bunch of globular clusters Telescopes used to discover outer planets Frederick Wilhelm Herschel (Frederick William Herschel) o Composed 24 symphonies o British, moved to England – George III ruling o Amateur astronomist – at night he would build telescopes, which eventually became the best in England o March 16, 1781 – discovered “something” – had a disc Not a comet – never developed a tail
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Named “Georgium Sidus” – George’s Star Europe didn’t like the politicizing of astronomy, so renamed URANUS – Greek mythology George III gave him a Royal Pension of 200 pounds 1 st planet to be discovered using a telescope o Then studied the orbit of Uranus – “Need 3 good observations to determine an orbit” – Gauss Orbit not doing what it was “supposed to” be doing John Couch Adams – mathematician, Europe o “Maybe there is another planet disturbing Uranus’ orbit” via Newton’s Law of Gravity o After graduating – figured out where planet had to be Goes to Astronomer Royale wouldn’t see him, but JCA left documents Urban Jean-Joseph Verrier – Frenchman o Made same calculations as Adams, went to see French Astronomer Royale, who was “too busy” o Writes to friend at Berlin Observatory (Galle), who went to observatory and found the discovery Adams and Le Verrier knew each other and refused to fight over who discovered NEPTUNE Scientific Notation 6,000,000,000 = 6 x 10 9 Caroline Herschel – Frederick’s sister he helped her avoid being a “hausfrou” (housewife) and she discovered many important discoveries Boston Brahmins o Brahmin – highest caste in Hindu religion; aristocracy in Boston o LOWELL’S Lawrence – president of Harvard college Amy – famous poet
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Stellar Exam 1 Notes - THE STELLAR UNIVERSE: EXAM 1 Planets...

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