Astronomy Test No. 1 Crossword
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
 
 
Down: 2) OUR SUN IS NOT THE CENTER OF THE MILKY WAY GALAXY.6) A star and all the material that orbits it, including its planets and moons. 7) A great island of stars in space, all help together by gravity and orbiting a common center.10) (including earth) orbit about the sun.12) A relatively small and rocky object that orbits a star. 13) A moderately large object that orbits a star; it shines primarily by reflected light. Planets may be rocky, icy, or gaseous in composition.16) (including the sun) orbit about the center of our Milky Way Galaxy.18) A relatively small and icy object that orbits a star. 21) The sum total of all matter and energy; that is, everything within and between all galaxies. Across: 1) (including our Milky Way Galaxy) orbit about the center of the local supercluster. 3) BIG BANG4) The Cosmic Calender: A scale on which we compare the history of the universe into 1 year. 1 day= 37.5x10^6 years where 1 year 356 days) equals to 13.7 billion years (age of the universe). 5) The distance light can travel in 1 year. About 10 trillion kilometers (6 trillion miles) Ex: We know what a galaxy looked like THEN but not now. 8) -The matter in our bodies came from the Big Bang, which produced hydrogen and helium. -All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system.9) ONE11) all galaxies outside our Local Group are moving away from us. The more distant the galaxy, the faster it is racing away. Conclusion: We live in expanding universe. All most all galaxies are moving away from us. The farther the galaxy the fast they are moving away. 14) An object that orbits a planet.15) -100 billion galaxies in the observable universe -14 billion light-years in radius -As many stars as grains of sand on Earth's beaches.17) Contrary to our perception, we are not "sitting still". We are moving with the Earth in several ways, and at surprisingly fast speeds. 19) An interstellar cloud of gas and/or dust.20) Far more numerous than the medium and large moon. Not enough gravity to spherical: 'potato-shaped"22) -100 billion galaxies in the observable universe -14 billion light-years in radius -As many stars as grains of sand on Earth's beaches.23) -Earth is a part of the solar system, which is the Milky Way Galaxy, which is a member of the Local Group of galaxies in the Local Supercluster.24) At average distance of 1 AU = 150 million km. With Earth's axis tilted by 23.5 (pointing Polaris) and rotates in the same direction it orbits. counter-clockwise as viewed from above the North Pole.25) A large, glowing ball of gas that generates heat and light through nuclear fusion. 26) The distance across the United States (2500 miles)27) ROTATION reveals one of the greatest mysteries (dark matter) in astronomy. 28) The Milky Way has about 100 billion stars.
 

 

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