英语翻译Scientists always want to know more about the universe.Y

英语翻译
Scientists always want to know more about the universe.Years ago they knew many things about the moon.They knew how big it was and how far away it was from the earth.But they wanted to know more about it.They thought the best way was to send men to the moon.The moon is about 384,000 kilometers away from the earth.A plane cannot fly to the moon because the air reaches only 240 kilometers away from the earth.But something can fly even when there is no air.That is a rocket.How does a rocket fly?There is gas in the rocket.When the gas is made very hot inside the rocket,it will rush out of the end of the rocket,so it can make the rocket fly up into the sky.Rockets can fly far out into space.They send spacecrafts to the moon.Spacecrafts with men in them have been to the moon.Several spacecrafts without men in them have flown to another planet much farther away than the moon.One day men may be able to go to any places in space.