289 people 👁️ing this randomlyThe Brightness of Stars | Astronomy Learning Objectives By the end of this section, you will be able to: Explain the difference between luminosity and apparent brightness Understand how astronomers specify brightness with magnitudes Luminosity Perhaps the most important characteristic of a star is its luminosity—the total amount of energy atRead More

906 people 👁️ing this randomlyCommonly Confused Suffixes: -ic vs. -ical Words ending in “-ic” and “-ical” The suffixes “-ic” and “-ical” both form adjectives meaning “of, resembling, characterized by, or relating to,” and they are notoriously difficult to distinguish. In many cases, words can be spelled with either ending with no change in meaning, withRead More

752 people 👁️ing this randomlyThe Nine Planets of The Solar System The Nine Planets is an encyclopedic overview with facts and information about the history, mythology and current scientific knowledge of the planets, moons and other objects in our solar system and beyond. Mercury The smallest and fastest planet, Mercury is the closest planet toRead More

275 people 👁️ing this randomlyFearOfPhysics.com: Home Free “Astronomy 101” course Are you interested in learning about astronomy? If so, here’s a set of about 300 short videos that will take you through the basics of our solar system. The videos will start with the why we have seasons, and go on through a tour ofRead More