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.