moon. Human beings creat spaceships to explore the space. Till now human beings had landed on the moon but there is still a long way to land on the Mars. It's so fantastc!
1 In 1961, scientists set up gigantic, sensitive apparatus to collect radio waves from the far reaches of space, hoping to discover in them some mathematical pattern indicating that the waves were sent out
为什么引力在太空和在地球上一样?Why Is Gravity in Space Not the Same as Earth?Every object in the universe pulls on every other object. This is called gravitation, or gravity. But the strength of that pul
the earth is the large spring bed, we jump, jump, jump, jump, really fun, I go to school in the spring bed jump leveret, mama, I unexpectedly jumped into the sky, " ah " I gaped, the results