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來源：網絡資源 2024-08-28 23:38:50
On December 25th,2021, NASA's James Webb Space Telescope(詹姆斯·韋伯太空望遠鏡，JWST ) took off on its journey to somewhere 1.5 million kilometers from Earth.There JWST will help us discover new information about planets far away, as well as what happened at the very beginning of time.
The JWST has been built for about 30 years and cost 10 billion dollars. It will take the place of the Hubble Space Telescope.which has been our eye watching outer space since 1990. The heart of JwST is a golden reflector(反品)that will catch signals from stars and planets and send them back to Earth. JWST's reflecting mirror is 6.5 meters across, almost three times wider than the one on the Hubble. This is what makes the JWST so powerful.
The better mirror as well as some instruments on JWST will help astronauts look deeper into space—and thus further back in time—than ever before.
JWST will be able to catch light from the very first stars that lit up the darkness of space when the universe began growing.Reactions(化學反應）in these objects caused creation of atoms of carbon,nitrogen(氫) and oxygen, which are the things needed for the living to develop. _★_,we might be able to better understand how the universe came to be the way it is.
JWST will also be looking at planets far away to help us understand if they could support life in any form.
1.How long did it take to build the JWST?
A. About 10 years.
B. About 20 years.
C. About 30 years.
D. About 40 years.
2.Why is the JWST so powerful according to the passage?
A. Its heart is made of gold.
B. It flies further than the Hubble.
C. It has more instruments than the Hubble.
D. It has a very large reflecting mirror.
3.JWST will do the following things in outer space EXCEPT_____.
A. discovering new information about planets far away
B.finding what happened at the very beginning of time
C.helping astronauts find better places to live and work
D. understanding if there are planets that could support life
4.Which of the following is the best to fill in the “__★___ ”?
A.By studying the light of the planets
B. By improving the instruments on JWST
C.By comparing the difference among the stars
D.By looking at what happened billions of years ago
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