就在我生日当天，黄老师在晓黑板上告诉我们说，有一个科普英语的比赛，三个人一组参加。然后就有两个人去邀请我参加，我当时脑子一抽就…就答应了。其实主要原因是因为听说小虎星也能参加，但是她已经进入另一个队了，所以不能和她一组了，好可惜啊！T-T但是如果我们组有一个好成绩那么小虎星一定能关注到我的！我们有三个主题，后来就确定了一个“韦伯望远镜”的主题。于是，我昨天就连夜赶出来了一篇演讲稿，我真的快要死了，有好多专有名词。唉，我就来浅浅地展示一下吧。
The construction of the Webb Space Telescope lasted from 1998 to 2021 and is the successor of the Hubble telescope., Jointly built by various aerospace companies. Due to various reasons, it can not take off for a long time, so it is called the pigeon king. The initial budget was $510 million, but the final budget was $10 billion. Finally, after about 32 years of conception and construction, it was finally completed and successfully launched.
James Weber\'s biggest one is the main mirror. 18 sub mirrors constitute the main mirror. In addition to the main mirror and sub mirror, there are three secondary mirrors, which together form an off-axis three mirror aberration canceller. In addition, there is a fourth mirror, which is a plane mirror for stable pointing and very small offset operation
How does the Weber telescope work? The light from 13.5 billion years ago first hit the main mirror with a diameter of 6.5 meters, rebounded to the convex secondary mirror, and then reflected downward and close to the off-axis to the third secondary elliptical mirror behind the main mirror. The third elliptical mirror can correct astigmatism and expand the field of vision together with the three sub mirrors, reflect the light back to the plane steering mirror, and finally back to the instrument.
Because of the off-axis three mirror aberration canceller structure, James Weber became larger, so he had to launch with Ariana 5 rocket, because the fairing of other rockets was not large enough, and Weber couldn\'t put it in after folding. In addition, Weber has an 8-meter-long mirror hanger, so James Weber is too big... Must be folded
Planning adjustment
?NASA failed three missions due to low-level mistakes and strategic adjustment
?Determine the rocket model and plan and adjust
?Budget overrun
?COVID-19 leads to shutdown
?Rocket and launch site preparation
?The error caused the telescope to vibrate unexpectedly
?Solve the communication problem between telescope and rocket
?The weather at the launch site was too noisy to rotate due to thunder
NASA\'s Goddard Space Flight Center in Maryland said in a statement that the telescope has successfully completed calibration and focused on a star, and the performance of the telescope has exceeded the predetermined standard.
The new image center is a star named HD 84406 in the constellation Ursa Major, about 241 light-years from earth, according to the statement. Other unidentified stars and galaxies can also be seen in the background of the image.
NASA said that if the mirror calibration can be completed in early May, the team will next calibrate the scientific instruments on the observatory, which is another major preparation step. The work is expected to be completed this summer, when the James Webb Space Telescope will be able to officially start its scientific observation.
There are still so many mysteries in the universe waiting to be explored,like black holes,and whether there are other planets out there that we might harbor life.
This is a space telescope that takes about 30 years-Weber telescope,which can be said to be a very huge project.Weber telescope has made great contributions to our human exploration of the universe,and let us see new possibilities for exploring the universe.
There are still so many mysteries in the universe waiting to be explored,like black holes,and whether there are other planets out there that we might harbor life.
（我已经要累瘫了，不过想到我能和小虎星同台竞争就真的很开心啊！）