Astronomy is the oldest science known to man. Thousands of years ago man looked at the stars and wondered about the heavens. But man was limited by what he could see with his eyes alone.
The Greeks studied astronomy over 2,000 years ago. They could see the size, color, and brightness of a star. They could see its place in the sky. They watched the stars move as the seasons changed. But the Greeks had no tools to help themselves study the heavens.
Each new tool added to the field of astronomy helped man reach out into space. They did not know that the planet called Saturn(土星) had rings around it. Their sight was so limited that they could not see all the planets. In the early 1700s, people thought there were only six planets. Nepture(海王星), the last of eight planets to be discovered, was not seen until 1846.
Before the spectroscope(分光镜), man did not know what kind of gases was in the sun or other stars. Without the radio telescope, we didn’t know that radio noises came from far out in space.
Today, astronomy is a growing science. We had learned more in the last fifty years than in the whole history of astronomy.
小题1:. Thousands of years ago, people observed the stars with the limitation of their _____.
A．eyesight
B．land
C．wealth
D．knowledge小题2:. When the Greeks watched the stars, they could ____ .
A．know what the stars were made of
B．not see their places in the sky
C．help themselves study the heavens
D．watch the stars move as the seasons changed小题3:. Until there were ____, man knew very little about the moon.
A．telescopes
B．spectroscopes
C．radio telescopes
D．spaceships小题4:. Which of the following sentences is NOT true?
A．Astronomy is the oldest science that humans have known.
B．Astronomy is developing fast with the help of technology.
C．In the early 1700s, people didn’t know the existence of Neptune.
D．Over 2,000 years ago, the Greeks knew the planet Saturn had rings around it.小题5:. This passage mainly talks about _____.
A．tools used in astronomy
B．the development of astronomy in the last 50 years
C．Greeks’ achievements in astronomy
D．new tools and the development of astronomy
