PPT-Milky Way thin disk

Q in order to study the spatial distribution of the thin disk which dominates the Milky Way luminosity surface photometry in the K band from space has been used What is the advantage of the K band What sort of stars give off most of their light at 2 microns. Lec21: The Milky Way The Milky Way GalaxyLecture 21APOD Lec21: The Milky WayAtomic, molecular, and ionized gas Lec. 21: The Milky Way21 -2 Lec21: The Milky Way The Milky Way Galaxy. When you look into the hazy band of light across the sky, you are actually looking at our galaxy from the inside. While an awesome sight, you can only truly begin to see it if you get away from city lights on a moonless night. . 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. 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. . Section 1: . The Milky Way Galaxy. K. What I Know. W. What I Want to Find Out. L. What I Learned. Essential Questions. What is the size and shape of our galaxy?. What are the different kinds of variable stars?. The Milky Way: Our Home Galaxy. What are the different. components of the Milky Way?. How do we see those components?. What does a map of each component look like from our point of view?. Stars in the Milky Way. M51 – A typical spiral-disk galaxy. The M81 group of galaxies. M82. M81. Satellite galaxy. Satellite galaxy. M81 group showing hydrogen emission at radio wavelengths. Composite image of M 81. Blue shows X-Ray observations(high energy), pink infrared (dust). Our Place Within It. . . The Visible Milky Way. The Milky Way as Seen From Texas. (from Canada, we can. ’. t see the Southern Cross). The Obvious Questions. How big is the Milky Way, and where are we located? At the . bye:. Angelina Battle. The legend of The Milky Way. This is what old people told me when I was a child. Long ago, when the world was new, there were not many stars in the sky. In those days people depended on corn for their food. They would grind it and keep it in bins behind their homes. Bread made from cornmeal, often kept them from starving during the long winter months. . Contains more than 100 billion stars. Is one of the two largest among 40 galaxies in the Local Group. Our Solar System is located a little more than half way from the galactic center to the edge of the galactic disk.. Galaxies (part I) . T. Howard. The Galaxy – part I -- Overview. New distance unit: the . parsec. (pc).. Using Earth-orbit parallax, if a star has a . parallactic. angle of 1",. it is 1 pc away. . Here’s the mystery story we’ll unfold…. Fuzzy blobs in the sky – new solar systems, or “galaxies”?. Observational tests. Herschel’s map of the “universe” . (what we today know as just our 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).