Introduction to Astronomy

Table of Contents

Intro to Astronomy
Definition of Astronomy
Electromagentic Spectrum
Periodic Table
Astronomy Word List
Misconceptions
Questions

Archaeoastronomy
Equitorial Coordinates
Understanding the Seasons

Time & Its Measurement

Telescopes 

Solar & Lunar Eclipses

The Solar System

The Earth

The Moon

Mecury, Venus, Mars

The Outer Planets

Solar System Debris

The Sun

Evolution of Stars

Intersteller Matter

Sky Literacy






    Basic Astronomy Word List

Astronomical Unit
     The distance from the Earth to the Sun - 93 Million Miles

Astronomy
      The Science which deals with all Matter-Energy in the universe

Big Bang
     Universe exploded from a primordial atom and will keep expanding forever

Black Hole
      The volume of space surrounding a collapsed star throughout which the
      escape velocity equals or exceeds the speed of light

Composition
      The qualitative and quantitative chemical makeup of matter

Distribution
      The position or arrangement of matter-energy throughout an area or space

Ecliptic
      Reference plane of the solar system which is created by the Earth orbiting the
     Sun

Electromagnetic Spectrum
      Gamma rays, X-rays, ultraviolet, visible, infrared, microwaves, and radio
      energy

Evolution
      The process of change of the universe over time from a beginning to an end

Galaxy
     Basic manner in which matter congregates in the universe; composed of
     millions to hundreds of billions of stars

Hydrogen
     The most abundant element in the universe composed of one proton and one
      electron

Ion
     An atom or molecule which is not electrically neutral because it has either
     gained or lost electrons

Light Year
     Distance that light travels in one year

Movements
     Change in the position of a heavenly body due to a change in the position of
     the earth or the body itself

Oscillating Universe
     A big bang universe that has sufficient matter to collapse once again

Physical State
     Solid, liquid, gas, and plasma

Plasma
     A hot ionized gas in which ions and electrons are in free association

Rotation
     The spinning motion of a body about its axis

Revolution
     The orbiting motion of one body around another body

Solar System
      Our Sun surrounded by its family of nine planets, moons, and lesser bodies

Steady State
      An outdated theory of the universe which states that the universe is infinitely
     old and infinitely expanding

Universe
     All matter-energy everywhere