Stellar Evolution VocabularyThe following are our terms used in this unit. Make sure you know the definitions of these terms (as related to our unit in astronomy). Note that more terms may be added before we end the unit:Absolute Magnitude: The brightness of a star from 10 parsecs away.Apparent Magnitude: The brightness of a star as viewed from Earth.Brown Dwarf: A category of objects that are more massive and hotter than planets but too cool and small to be a star. Exoplanet: Planets outside of our solar system.HR Diagram: Chart that compares stars’ color, temperature, or spectral type to their luminosity, absolute magnitude, or mass. Light Year: A unit of measuring distance in which it takes a year for light to travel. Luminosity: The amount of light or energy emitted by a star.Main Sequence: A grouping of stars in which the majority of stars fall into. Microlensing: Background light becomes bent near an object because of gravity.