PPT-The Milky Way and Other Galaxies

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. 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. . Our Evolving Universe. 1. Other galaxies. Telescopic images of the night sky reveal many other galaxies. What do they look like?. are they all like the Milky Way?. Where are they?. spread randomly through space, or grouped?. http://www.pa.uky.edu. Only 10% of the class has completed the evaluations so far.. I will add 5 points on your final exam if you complete the evaluation.. Today’s model for the formation of the Milky Way and other galaxies. Ms. Cordaro . SMHS . Earth Science. Review/Warm up – Write this in your journal. (Do not fill in the blanks yet!!). A light year = How far _ _ _ _ _ travels in _ _ _ year.. The electromagnetic spectrum is made up of different size _ _ _ _ _ that produce _ _ _ _ _ _ in the form of radiation.. 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. 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:. 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. . Lecture 2; . April 9 2013. Previously.. On Astro-2. The goal of cosmology is to understand how the universe formed and evolved.. How can we build a theory of the universe valid at all times in every place? . 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. . in the Universe?. What is the solar system?. The solar system consists of:. The sun (which is the name of our star). Planets . Asteroids . Comets . Space rocks . Measurement in Astronomy. Scientists find it hard to work with the measurements we use on earth, like kilometers and miles, because the distances are so great it is hard for us to comprehend such enormous numbers. . 4.f. Describe the hierarchical structure (stars, cluster, galaxies, galactic clusters) of the universe & examine the expanding universe to include its age & history & the modern techniques (e.g. radio, infrared, ultraviolet & x-ray astronomy) used to measure objects & distances in the universe. (DOK 2). Chapter 21. How does distance affect an image?. Telescope- device that makes an object in the sky appear closer.. Revolutionized astronomy (study of space)- allowed them to see objects in space for first time.. Are Nebulae within or outside of our galaxy??. Nebula comes from a Greek word meaning Cloud. April 1920, National Academy of Sciences , Washington, DC. Harlow Shapley (had determined size of Milky Way Galaxy) pushed that nebulae were relatively close by objects..