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	 | 
    Glossary Part 4
    Welcome to the Glossary section of
    the Solar Space Station, below is a comprehensive list of all the basic space-related
    words. If you have any additions, please e-mail me at . 
 Just click on the letter your desired word begins with from the list just below: 
    A 
    B  C  D  E  F 
    G  H  I  J  K  L  M  N  O  Q  R  S 
    T  U  V  W  X  Y  Z 
    R 
    
      
        | Radar Mapping | 
        A way of mapping a planet's surface
        using electromagnetic waves. | 
       
      
        | Radiation | 
        Electromagnetic waves or particles which
        travel through space carrying energy. | 
       
      
        | Radio Telescope | 
        A telescope shaped like a satellite dish which allows
        astronomers to collect radio waves from space. | 
       
      
        | Remote Control | 
        A space probe operated by commands sent from here on
        Earth (eg Pathfinder rover) | 
       
      
        | Retrograde Motion | 
        When a body moves around the Sun in the opposite
        direction to Earth. | 
       
      
        | Ring System | 
        Some planets have millions of tiny rocks circling
        their equator which look like rings. | 
       
      
        | Rocket | 
        Piece of equipment used to send stuff into space. | 
       
     
    S 
    
      
        | Satellite | 
        An object which circles another object. | 
       
      
        | Shepherd Moon | 
        Name given to tiny moons which orbit
        outside and inside a planet's ring system | 
       
      
        | Solar | 
        Of the Sun. | 
       
      
        | Solar Nebula | 
        The large cloud of gas from which the
        Sun and planets were formed 4,600 million years ago. | 
       
      
        | Space Probe | 
        Machine sent out into space. | 
       
      
        | Space Station | 
        A satellite orbiting the Earth that
        people can live on | 
       
      
        | Spacecraft | 
        Unmanned machine sent from Earth into
        space. | 
       
      
        | Spaceship | 
        A manned spacecraft. | 
       
      
        | Star | 
        A big ball of burning gas sustained by
        nuclear reactions | 
       
      
        | Sun | 
        The star at the centre of the Solar
        System | 
       
      
        | Sunspot | 
        Dark, cool spots which form on the
        surface of the Sun. | 
       
      
        | Supernova | 
        The explosion that occurs when a large
        star dies. | 
       
      
        | Synchronous Rotation | 
        Phrase describing when a planet's moon takes the same
        amount of time orbiting the planet as it does spinning. This means the same side always
        faces the planet. | 
       
     
     
    T 
    
      
        | Telescope | 
        A device which magnifies an
        object it is focused on. This is used a lot to observe celestial objects in space. | 
       
     
    U 
    
      
        | Ultraviolet | 
        A part of the electromagnetic spectrum, with a higher frequency than blue light, but lower than X-Rays. | 
       
      
        | Universe | 
        Everything around us is part of the
        Universe. | 
       
     
    V 
    
      
        | Volcano | 
        A mountain which lava comes out of in
        some way or other. | 
       
     
    W 
    
      
        | White Dwarf | 
        A white, small, very dense star. The Sun
        will be in this state in about 6,00 million years. | 
       
     
    X 
    
      
        | --------- | 
        Know of any words which should be here
        that aren't? If so, please E-mail me. | 
       
     
    Y 
    
      
        | --------- | 
        Know of any words which should be here
        that aren't? If so, please E-mail me. | 
       
     
    Z 
    
      
        | Zodiac | 
        The imaginary band of the night sky
        through which the Sun appears to travel during a year. It contains 12 constellations. | 
       
     
     |