CHAPTER 1
OUR PICTURE OF THE UNIVERSE
A well-known scientist (some say it was Bertrand Russell) once gave a public lecture on astronomy. He
described how the earth orbits around the sun and how the sun, in turn, orbits around the center of a vast
collection of stars called our galaxy. At the end of the lecture, a little old lady at the back of the room got up and
said: “What you have told us is rubbish...
置顶卡
变色卡
千斤顶
显身卡
