Nebular Theory Crossword Puzzle

Clouds made from the collection of dust and gas
A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
A astronomy of the earth, visible by reflected light from the sun
A reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles
Pulled together low-density cloud of interstellar gas and dust (called a nebula)
A whirling cloud of gas or dust that becomes a planet by condensation during formation of a solar system
A contracting mass of gas that represents an early stage in the formation of a star, before nucleosynthesis has begun
It consists of minor planets forming a disk around the sun
A theory that the solar and stellar systems were developed from a primeval nebula
A spherical shell of cometary bodies believed to surround the sun far beyond the orbits of the outermost planets.
A dense gas and dust surrounding a young newly formed star
Rocks hitting each other in space and to create planets, make scars or even destroying them