6. <u> </u><u> </u><u>Colour</u><u> </u><u> </u><u> </u> is light reflected off objects. It has three main characteristics.
7. <u> Hue </u> the name given to a color (blue, red, etc.)
8. <u> Value </u> the lightness or darkness of a color.
9. <u> </u><u> </u><u> </u><u> </u><u>Intensity</u><u> </u><u> </u> (also known as capacity or chroma) the brightness or dullness of a color.
10. <u> </u><u> </u><u> </u><u>Line</u><u> </u><u> </u> is the most basic design feature; a mark used to symbolize directions or curves.
In astronomy, the interstellar medium (ISM) is the matter and radiation that exist in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays. It fills interstellar space and blends smoothly into the surrounding intergalactic space
