12_MilkyWay.key.pdf - The Milky Way Galaxy 1...

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The Milky WayGalaxy112_MilkyWay.key - May 3, 2018
The Milky WayAlmost everything we see inthe night sky belongs to theMilky Way.We see the Milky Way as a faintband of light across the sky.From outside, our Milky Waymight very much look like ourcosmic neighbor, theAndromeda galaxy.212_MilkyWay.key - May 3, 2018
312_MilkyWay.key - May 3, 2018
First Studies of the GalaxyFirst attempt to unveil thestructure of the Galaxyby William Herschel(1785), counts of stars in683 different directionsbased on opticalobservationsThe shape of the Milky was believed to resemble a grindstone,with the sun close to the center.412_MilkyWay.key - May 3, 2018
Determining the Structure ofthe Milky WayGalactic PlaneGalactic CenterThe structure of our Milky Way is hard todetermine because:1) we are inside.2) distance measurements are difficult.3) our view towards the center is obscured by gas and dust.512_MilkyWay.key - May 3, 2018
612_MilkyWay.key - May 3, 2018
Exploring the Galaxy UsingClusters of StarsTwo types of clusters of stars:1)Open clusters= young clustersof recently formed stars; within thedisk of the GalaxyOpen clustersh andχPersei2)Globular clusters= old, centrallyconcentrated clusters of stars; mostly ina halo around the GalaxyGlobular Cluster M 19712_MilkyWay.key - May 3, 2018

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