Space exploration does not come cheap
点击量： 时间：2017-06-10 02:02:09
SPACE travel is 50 next month. In this relatively short time, we have put people in orbit, walked on the moon and created a permanent encampment in space. We have surrounded Earth with satellites looking inwards and outwards, our spacecraft have visited every planet in the solar system and a probe is even now heading for ex-planet Pluto. Has it all been worth it? Some think not. Through the decades, one question has repeatedly sprung to the lips of opposing politicians: would the money invested in exploring space be better spent helping the poor here on Earth?