Science: God's Great Universe Crossword Puzzle

QUESTIONS LIST:

• ellipse : a symmetrically shaped oval
• astronomical unit : distance between the earth and the sun
• barred spiral : type of galaxy which arms are attached to a straight bar that runs through the center
• ptolemy : last name of the scientist who presented the idea of an earth centered universe
• apparent : the magnitude of the brightness of a star as seen from earth
• gravity : the force of attraction that exists between any two objects
• constellation : stars outlining an imaginary picture
• sunspots : dark patches of gas that are cooler and located on the sun's surface
• elliptical : type of galaxy which resembles an egg or football
• photosphere : the sun's visible surface
• spiral : type of galaxy with a central nucleus and attached arms that curve out
• copernicus : last name of the scientist who presented the idea of a sun centered universe
• astronomer : scientist who studies outer space
• absolute : the magnitude of the actual brightness of a star
• nebulae : large clouds of gas and dust floating in space
• irregular : type of galaxy with no definite shape
• foci : the two points of an ellipse
• vacuum : an area containing no air or any other matter
• light year : the distance light travels in one year
• galaxy : a star system containing from millions to billions of stars
• newton : the last name of the scientist who studies gravity
• kepler : last name of the scientist who studied the orbital motions of the planets
• binary star : also called a double star
• friction : the force that resists motion
• polaris : another name for the north star