cloud of interstellar gas and dust
formed when cloud contracts and forms a disc shape with a hot condensed object at the center
formed by collapse of supernovae. Resistance to being squeezed creates pressure that halts collapse of the core, and the core becomes this.
formed when the entire outer portion of a star is blown off in a massive explosion
small but extremely dense object in which gravity is so intense nothing can escape it, not even light
largest object in the solar system in both size and mass. average density is similar to gas giants.
visible light arranged by wavelengths
groups of stars
two stars that are gravitationally bound together and orbit a common center of mass
star's temperature, luminosity, and diameter
governed by mass
sun and stars on the main sequence produce energy by pushing hydrogen into helium