Solar System Stuff Crossword

a small rocky body orbiting the sun.
a celestial object consisting of a nucleus of ice and dust.
the theory that the solar and stellar systems were developed from a primeval nebula.
an element with an atomic number greater than 92.
the regions of the surface, atmosphere, and hydrosphere of the earth.
a planet that is composed primarily of silicate rocks or metals.
a large planet of relatively low density consisting predominantly of hydrogen and helium
the continuous flow of charged particles from the sun which permeates the solar system.
a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
unstable isotopes that release subatomic particles or energy as they decay.
the smallest and innermost planet.
the second planet from the Sun.
the planet on which we live.
the fourth planet from the Sun and the second-smallest planet.
the fifth planet from the Sun and the largest in the Solar System.
the sixth planet from the Sun and the second-largest.
the seventh planet from the Sun.
the eighth and farthest known planet from the Sun.
asteroid, comet, nebular theory, heavy elements, biosphere, terrestrial planets, gas giants, solar wind, radioactive dating, radioactive elements, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and