ANSWERS: 3
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Earth WILL eventually cease to be! It's a mathematical certainty!
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I don't think the sun moves. The universe is constantly expanding but the sun is centre of our solar system and i think it's staying there.
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Great question! Here's an answer from the Cornell Astrophysics department: "The Sun (revolves) around the Milky Way on an almost circular orbit with a speed of about 220km/s. The Sun completes one revolution in about 230 million years. The Milky Way also moves - we are moving towards or nearest neighbour the Andromeda galaxy and both the Milky Way and Andromeda (which make up most of what we call the 'Local Group of galaxies') are moving towards the Virgo Cluster which is our nearest cluster of galaxies. Nothing seems to stand still at all!" http://curious.astro.cornell.edu/question.php?number=96
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