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National Geographic “Space Quest” Notes Vocabulary: Axis - line about which a rotating body such as Earth turns Galaxy – system of stars Gravity – pulling force that all objects have Rotation – act of turning around a center Star - body of hot gases that gives off energy Telescope – device used to study distant objects. It takes the Earth 24 hours to make one rotation on its axis. The sun is the largest object in our solar system. The sun is not the brightest star in the sky. The hubble space telescope take pictures in space. A nebula is a cloud of gas and dust in space. It takes millions of years to make a star. Stars shine with different colors. Hot stars are blue and cooler stars are reddish. Jupiter is the largest planet. Black Holes are small dense objects and they have super strong gravity…light can not even escape a black hole.