Cosmology, Stars, Galaxies

Sort the galaxies into the correct categories. Spiral (3) Elliptical (2) Irregular (3) Correctly fill in the blanks. Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. It spins counterclockwise and, it’s all held together by gravity. The Milky Way has a spiral shape. At the center, called the nucleus, we would find the largest stars and a super massive black hole. Our solar system is located on one of the spiral arms called Orion. The glowing light that comes off of a galaxy is called the halo. The next closest galaxy to us is called Andromedaand is also a spiral galaxy. Match the vocabulary word with the correct definition. Astronomical Unit A unit of measurement equal to the distance from the Earth to the Sun Light-Year The distance that light travels in one year 13.7 Billion Years The age of the universe 4.6 Billion Years The age of the solar system Galaxy A system of millions or billions of stars Luminosity The brightness of a celestial (space) object Nebula A cloud of gas and dust in space Star Life Cycle Label the steps in the life cycle correctly. Use the word back in the bottom EXACTLY as shown. Nebula Average Main sequence star Red Giant White dwarf Massive Main Sequence Super Red Giant Neutron star Black hole Supernova Use the HR Diagram to answer the questions. Based on what you know, where on the chart would the sun fall? Upper left region Close to the center Lower right region Which of the following star types ends up bring brightest? blue giants red giants white dwarfs Which of the following star types ends up being coolest in temp? blue giants red giants white dwarfs What is the name of our galaxy? Milky Way Andromeda Whirlpool What phase of life is the Sun in?