Fill in the Blanks Technology Reading Passage Online version EL111 Reading 2 by Bassant Ayman Ahmed Abdil Alim 1 System planets inhabit planets astronomers orbit satellite Solar moon universe furthest launched exploration star all at Hundreds of Years ago , People in Europe believed that the earth was the centre of the . They thought that the Sun and all the went around the Earth . However , at the start of the 16th century , a Dutchman called Copernicus said : " The Earth an all the planets the Sun " . We know now that the Sun is a at the centre of our Solar System . Some say that there are nine in our system . Others believe that there are only eight . Pluto is usually the planet from the Sun , but it is so small that some people say it is not a planet . The Earth is the thirds planet from the Sun . It is the planet that we . It has a natural which orbits the Earth . It is called the . Our is in space . No human being went into space until the second half of the 20th century . In 1969 , men landed on the moon and returned safely to Earth . Now , Spacecrafts are almost every month . Many scientists think that the next object for space is the planet Mar s
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