Space Physics Crossword Puzzle

QUESTIONS LIST: dark: a hypothesized for of energy, believed to be responsible for the universe's every increasing rate of expansion, sun: a star formed from a cloud of dust and gas being pulled together by gravitational attraction, protostar: the first state stars go through after forming from a nebula, mercury: planet closest to the sun, fusion: the chemical reaction that occurs in the sun, big bang: the currently accepted model for the origin of the universe, hydrogen: main gas found in a star, nebula: a cloud of dust and gas, supernova: the explosion of a massive start, that distributes the elements created by the fusion reactions in then star, through the universe, natural: moons that orbit planets are _ satellites, cosmic: _ microwave background radiation (cmb), redshift: the observed increase in the wavelength of the light emitted by distant galaxies, sequence: main _ star is the stable state of a star.