PPT-The Milky Way The Greek philosopher Democritus (450–370 BC) proposed that the bright

Neoplatonist philosopher Olympiodorus the Younger c 495570 AD criticized this view arguing that if the Milky Way were sublunary it should appear different at different times and places on the Earth and that it should have parallax which it does not In his view the Milky Way was celestial This idea would be influential later in the Islamic world. 1. x. kcd.com. EECS 370 Discussion. Topics Today:. Function Calls. Caller / . Callee. Saved . Registers. Call Stack. Memory Layout. Stack, Heap, Static, Text. Object Files. Symbol and Relocation Tables. 1. xkcd. EECS 370 Discussion. Exam 2. High: 97 Low: 10 Average 60.4. 2. EECS 370 Discussion. Roadmap to end of semester. Project 4 – Friday . 12/6 (Due tonight at 11:59 w/ 3 slip days). Homework 7 – Tuesday 12/7 (Tomorrow). Recap. Canvas homework: due on Wednesday. Lab this week: Galaxy Morphology. Campus Observatory. Milky Way galaxy. Stars: . brightnesses. , masses, sizes, compositions, evolution. Interstellar matter: gas, dust. Aim: How did Ancient Greece influence the world?. Do Now: Write your prediction to the following:. Ms. C is going to say something to a student secretly. . Do you think that statement will be distorted by the time it gets to the last student? Why or why not?. Galaxy. part 2. Unit: . Galaxies. Star systems like our Milky Way. Contain a few thousand to tens of billions of stars.. Large variety of shapes and sizes. Galaxy Diversity. The Hubble Deep Field:. William Herschel’s map of the Milky Way based on star counts. In the early 1800’s William Herschel, the man who discovered the planet Uranus, tried to understand the shape of the Milky Way by counting stars. He counted how many stars there were in each of dozens of different directions and then plotted the count versus direction. . 23.1 Our Parent Galaxy. 23.2 Measuring the Milky Way. Early “Computers”. 23.3 Galactic Structure. 23.4 The Formation of the Milky Way. 23.5 Galactic Spiral Arms. Density Waves. 23.6 The Mass of the Milky Way Galaxy. 1. xkcd.com. EECS 370 Discussion. Topics Today:. Control Hazards. Branch Prediction. Project 3. s. tackoverflow. Example. 2. EECS 370 Discussion. Control Hazards. Key Concept. Which LC-2K instruction(s) can cause a Control Hazard?. Spiral Structure. . The Astronomical Context. By the 1920’s, we knew that the once-mysterious spiral nebulae were flattened galaxies. . Our Milky . Way is . also. flattened. . Two obvious . questions arose:. Vital Statistics. It’s our home!. Contains more than 200 billion stars, and a mass of ~10. 12. suns. It’s almost as old as the Universe itself!. 13.7 billion years old. Structure. The core and spiral arms are of different . The Greek philosopher Democritus (450–370 BC) proposed that the bright band on the night sky known as the Milky Way might consist of distant stars. Aristotle (384–322 BC), however, believed the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place in the upper part of the atmosphere, in the region of the world which is continuous with the heavenly motions.“ The . Chapter . 13, . Sections . 1. -5,7 (12 . pages). Homework for Next Time: . www.galaxyzoo.org. Question. Which of these is a picture of the Milky Way?. A. B. D. C. The Milky Way. Angular Size. Andromeda: MW’s Sister Galaxy. The astonishing variety of galaxies derived from a few structural types. Sec 1.3. Irregulars. = misfits in any class. Edwin Hubble . The Realm of the Nebulae . (1936. ). ‘. Tuning Fork’ classification scheme of galaxies. David Spergel. What has changed?. Context:. Standard cosmological model. No galaxy is an island… (John Dunne vs. Immanuel Kant). Tools:. Statistical galactic astronomy. 100s of stars -> 100,000s -> 1e9 (GAIA +LSST).