What is the Universe? The Universe is everything that exists in space. It is made up of millions of galaxies. Each galaxy contains millions and millions of stars, planets and other celestial bodies that are far apart. The origin of the Universe Most astronomers believe the Universe began about 15 billion (15,000,000,000) years ago. At that time, the Universe was contained within a single point. Then it suddenly started to expand. The stars, galaxies and other celestial bodies began to form. We call this the big bang theory. Artist's impression of the big bang Milky Way Orion Arm centre of the galaxy Solar System Earth 1 ●○○ ANSWER in your notebook. What is the Universe? How did the Universe begin? Where is Earth in the Universe? 2 ●●○ listen and answer. How big is the Universe? Earth's location in the Universe Astrology is the belief that the positioning of the stars and planets affects people's lives. "Astrology is a science." Do you agree with this statement? Explain your answer. Tru e or F a l s e 88 · e i g h t y - e i g h t
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