Chapter 14 Jennifer Blazejack

Introduction
14.1: The Milky Way Revealed
14.2: Galactic Recycling
14.3: The History of the Milky Way
14.4: The Mysterious Galactic Center
Conclusion
Introduction
We looked the night sky and studied the full moon. It is the smallest full moon. Jupiter could be seen as a tiny bright dot near the moon. We were then told that all quizzes would now be posted on the blog, Chapter 15 and 16 would be discussed next week, and that the term paper and PowerPoint are due on December 12.
14.1: The Milky Way Revealed
The Milky Way appears as a faint band of light in our sky. When looking at our galaxy we can see a disk, bulge, halo, and globular clusters (Figure 14.1 shows these parts in the Milky Way). The Milky Way also has spiral arms.
Stars orbit our galaxy in an up and down motion around the Milky Way's black hole in the center. Halo stars, on the other hand, have chaotic motion and don't follow the other stars (direction wise). As stars get closer to the black hole they can reach the speed of the speed of light.
14.2: Galactic Recycling
Stars are being constantly reborn (then grow and reach middle age) and dying. When a star dies, it expels gas into space and can cause hot bubbles to form. Dying stars mix new elements into the medium interstellar, where it slowly cools, making molecular clouds where the stars formed. The darker parts are cooler and stars can be found there.  Stars are reborn in the Orion Nebula and cycle through the star-gas-star-cycle.
14.3: The History of the Milky Way
Halo stars formed from heavy elements. Heavy elements were formed at the beginning of the universe so it is believed that halo stars are old and formed before disk stars. Disk stars contain many ages of stars and are formed like our Sun.
14.4: The Mysterious Galactic Center
Evidence supports the fact that there is a blackhole in the center of the Milky Way. This blackhole is about 4 million times the mass of our Sun. We can see this with infrared and radio waves, which can see through dust  and gas clouds.
Conclusion
We were reminded of the final exam coming up ( which has a similar format to the mid-term). We encouraged to take more science classes at the college.