Who Was Leonardo da Vinci 达·芬奇 THE UNIVERSE

IN THE SECOND CENTURY A.D., THERE WAS A FAMOUS GREEK ASTRONOMER¹ NAMED PTOLEMY. HE BELIEVED THAT THE EARTH WAS THE CENTER OF THE UNIVERSE. THE OTHER PLANETS AND THE SUN MOVED AROUND THE EARTH. PEOPLE ACCEPTED THIS BELIEF UNTIL THE MIDDLE OF THE 1500S. A POLISH ASTRONOMER NAMED NICOLAUS COPERNICUS SAID THE EARTH WAS NOT THE CENTER OF THE UNIVERSE. THE SUN DID NOT REVOLVE² AROUND IT. INSTEAD, THE EARTH—AND ALL THE OTHER PLANETS—REVOLVED AROUND THE SUN. HE WAS RIGHT. BUT IT TOOK MANY YEARS BEFORE THIS FACT WAS ACCEPTED.

1 astronomer   

n.天文学家

参考例句：

• A new star attracted the notice of the astronomer.新发现的一颗星引起了那位天文学家的注意。
• He is reputed to have been a good astronomer.他以一个优秀的天文学者闻名于世。

2 revolve   

vi.(使)旋转；循环出现

参考例句：

• The planets revolve around the sun.行星绕着太阳运转。
• The wheels began to revolve slowly.车轮开始慢慢转动。