Crossword Puzzle Standard 1 Objective 1 and 2Online version Universe and Solar System by Coach Jim Miller Jr. 1 Large spiral system consisting of several hundred billion stars, one of which is the Sun. 2 An element with an atomic number greater than 92. 3 A hypothesis concerning the formation of stars and planets, and therefore the origin of the solar system, according to which a rotating nebula underwent gravitational collapse into a star with an accretion disk, from which planets condensed or formed by coagulation of dust particles into increasingly larger bodies. 4 The universe may have been created in a huge explosion at least 12 billion years ago. 5 The gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. 6 The nature of something's ingredients or constituents; the way in which a whole or mixture is made up. 7 According to the proportions of an established scale of measurement. 3 2 4 5 6 7
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