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The sun by Miss Marichel Robinson February 7, 2006 Astronomy 2010 1 The Sun The Sun is a STAR. A STAR is a ball of hot glowing gases. Because the SUN is so bright, you can not see the other stars during the day. The SUN is the center of the SOLAR SYSTEM. 3 Center and Temperature The center of the SUN seems to glow because of the heat and energy that it gives off. The temperature on the sun ‘s Surface is very hot. In the center it is much hotter. The Sun and Energy The SUN produces ENERGY that travels out from the Surface of the SUN. Energy from the SUN lights and warms the EARTH. Sunspots There are dark spots and bright spots on the SUN’S Surface. The dark spots are called SUNSPOTS. They appear dark because they are cooler than the areas around them. Flares The temperature in the bright spots, called flares, is higher than the temperature of the SUN’S Surface. Earth’s Axis Earth’s axis is an imaginary line that runs between the North Pole and South Pole. Earth’s spinning Earth’s spinning causes night and day. Rotation The Earth makes one complete spin, or ROTATION every 24 hours. Revolution The path the Earth travels around the sun is called an orbit. One complete orbit around the Sun is called a REVOLUTION. The end