A cloud of interstellar gas and dust (where stars form)
Nebula
A medium sized, main sequence star located in a spiral arm of the Milky Way Galaxy
Sun
stars that have diameters 10-100 times as large as the sun
Giant Stars
Stars that have diameters greater than 100 times as large as the sun
Super Giants
Tremendous explosion of a dying supergiant star
Supernova
a neutron star that gives off pulses of radio waves
Pulsar
Celestial object consisting of an extremely dense mass of neutrons
Neutron Star
A low or medium mass star, approximately the size of the earth that has undergone gravitational collapse and is in its final stage of evolution
Dwarf Stars
The combining of 2 lighter elements to form a heavier element and in the process release energy (this is the process by which a star shines)
Nuclear Fusion
Any star that is fusing hydrogen in its core and has a stable balance of outward pressure from core nuclear fusion and gravitational forces pushing inward
Main Sequence Star
A place in space where gravity pulls so much that even light cannot escape
Black Hole