Nebula- a cloud of gas and dust in outer space
Protostar- a contracting mass of gas which represents the early stage of formation in a star
White Dwarf- a stellar remnant composed mostly of electron-degenerate matter
Supernova- transient astromnical event that occurs during th last stellar evolutionary stages of a massive star's life
Neutron Stars- a type of compact star
Pulsar- a highly magnetized rotating neutron star
Black Hole- a region of space-time exhibiting so much gravitational effects that nothing can escape from inside it
Spiral Galaxy- flat, rotating disc containing stars, gas, and dust
Barred-spiral Galaxy- central bar-shaped structure composed of stars
Irregular Galaxy- a galaxy with no distinct, or regular shape
Quasar- a massive and extremely remote celestial object, emitting large amounts of energy
The Big Bang Theory- a cosmological model that explains the early development of the universe
Dark Matter- a hypothetical substance that is believed by most astronomers
Dark Energy- unknown form of energy which is hypothesized to permate all of space