1. Day 11: The Big Bang Theory

2. Astronomy Intro Grade 9 Science The Expanding Universe The Visible Spectrum –____________________________________ ____________________________________ Red Orange Yellow Green Blue Violet - ____________________________________ ____________________________________

4. Astronomy Intro Grade 9 Science The Expanding Universe ______________________________________ ______________________________________. Edwin Hubble __________________________ ______________________________________ ______________________________________ ______________________________________ This meant that wavelength ________________ and the galaxy was ______________________

5. Astronomy Intro Grade 9 Science Red Shift & Blue Shift Red Shift –____________________________________ ____________________________________ Blue Shift –____________________________________ ____________________________________

6. Astronomy Intro Grade 9 Science The Big Bang Theory ______________________________________ ______________________________________ ______________________________________ At time zero all matter in the universe was packed together into one small, extremely dense, hot mass under enormous pressure.

7. Astronomy Intro Grade 9 Science The Big Bang Theory __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ _________________________________.

8. Astronomy Intro Grade 9 Science Work: i) Read Pg# 278 - 286 and Answer Q# 1-4 on Pg 284 and 1- 5 on Pg 288

9. Astronomy Intro Grade 9 Science http://www.solarspace.co.uk http://www.classzone.com/books/earth_sci ence/terc/navigation/visualization.cfmhttp://www.classzone.com/books/earth_sci ence/terc/navigation/visualization.cfm http://www.windows.ucar.edu/tour/link=/my thology/stars.html&nl=1lhttp://www.windows.ucar.edu/tour/link=/my thology/stars.html&nl=1l History… Geocentric Model

10. Explanation: Few cosmic vistas excite the imagination like the Orion Nebula, an immense stellar nursery some 1,500 light- years away. Also known as M42, the nebula is visible to the unaided eye, but this stunning infrared view from the Spitzer Space Telescope penetrates the turbulent cosmic gas and dust clouds to explore the region in unprecedented detail. At full resolution, the remarkable image data yields a census of new stars and potential solar systems. About 2,300 young stars surrounded by planet-forming disks were detected based on the infrared glow of their warm dust, along with about 200 stellar embryos, stars too young to have developed disks. This 0.8 by 1.4 degree false-color image is about 20 light-years wide at the distance of the Orion Nebula. Spitzer's Orion http://antwrp.gsfc.nasa.gov/apod/ap060818.html

11. The Basic Idea Key Points: A cloud of interstellar gas exists The mass and radius of the cloud reaches a limit called the Jeans mass and Jeans Radius The cloud starts to rotate The rotation forces the cloud into a disk The protostar forms in the center of the now rotating disk called a protoplanetary disk Once the star is formed and fusing hydrogen it releases energy in a jet (which can be seen on the next slide)