PPT-Lives of Stars Section 21.3

Stephen Hawking The Birth of Stars YouTube Life Cycle of Stars Nebula large cloud of gas and dust spread out in an immense volume Life Cycle of Stars Gravity pulls gas and dust together in the densest part of the nebula. Richard B. . Larson. Yale University. Conclusions. Compact objects such as stars and black holes generally form in larger systems such as binaries, multiple systems, star clusters, or galaxies.. Gravitational interactions in these larger systems play a major role in the formation of compact objects by transporting angular momentum.. Double Stars/Binary Stars. . Binary Star. Double Star. Earth. Earth. Visual Binary Stars. Orbit of Star 1. Orbit of Star 2. Center of Mass. Sirius A & B. Orbit of 12 Persei. (Barlow, Scarfe, and Fekel. Detailed Study 3.1. Chapter . 10.1: Motion in the Heavens. Astronomy. The night sky or ‘heavens’ is a spectacular . natural display . best . seen from a dark setting . (away . from city . lights).. Stars come in a wide range of temperatures, sizes, masses and colors. The constellation of Orion is a good example of the variety of stars. How can we learn about stars?. Suppose you are an alien with three days to learn everything you can about the human species. Amole. Spectra of Science. 2013. What are Stars?. A large celestial body of hot gas that emits light. Greeks grouped stars in patterns called constellations. Use the unit light-year to measure distances between stars. Lately . I been, I been losing sleep. Dreaming about the things that we could be. But baby, I been, I been prayin' hard. Said no more counting dollars. We'll be counting stars. Yeah, we'll be counting stars. "There are countless suns and countless earths all rotating around their suns in exactly the same way as the seven planets of our system. We see only the suns because they are the largest bodies and are luminous, but their planets remain invisible to us because they are smaller and non-luminous. The countless worlds in the universe are no worse and no less inhabited than our Earth”. B-V color index way of quantifying this - determining spectral class - using two different filters. one a blue (B) filter that only lets a narrow range of colors or wavelengths through centered on the blue colors, . Cepheids. Very late in their lives, massive stars can pass briefly through a stage in which they are . unstable.. During this stage, . their outer. parts oscillate . (. ‘. pulsate. ’. ) in . a. nd out. The “. Cosmic Distance Ladder. ”. Visual. “. Parallax. ”. “. Binocular. Vision”…. Let’s us “see” 3D images . (depth). …but, how to do this to get . Astronomical Distances. ?. “. constellations. a. Ancient cultures used . mythology. or everyday items to name constellations. 2. Modern astronomy studies . 88 . constellations. 3. Some constellations are not . visible. all year because Earth revolves around the Sun. Elementary Tests in STARS during 2016-2017. 2. Secondary Tests in STARS during 2016-2017. 3. mpsaz.org/stars. 4. STARS – Teacher Login. mpsaz.schoolcity.com. – Direct Link to Teacher Login. Use Active Directory credentials to log on. Stars 1. Patterns of stars – constellations a. Ancient cultures used mythology or everyday items to name constellations 2. Modern astronomy studies 88 constellations 3. Some constellations are not A . star is a massive ball of plasma that emits . light and electromagnetic energy . throughout the universe. . While . there is only one star in our solar system, there are billions upon billions of stars throughout our galaxy and exponentially more in the billions of galaxies in the universe.