Why Did NASA Just Launch a Planetary Defense Mission? 為什麼 NASA 剛剛啟動了行星防禦任務？

"Unveiled" Channel on YouTube shows what it is that NASA is worried about. Earth needs defending.

The so-called Double Asteroid Redirection Test (DART) is interesting. Launched in November, 2021, this is one of NASA’s most ambitious planetary defense projects to date. The SpaceX head, Elon Musk, even says it could "avenge the dinosaurs"! This informative video takes a closer look.

Unveiled gives you incredible answers to extraordinary questions!

0:00 Intro

0:46 What is the NASA DART Mission?

3:54 NASA and International Partners

4:52 Should We Be Worried?

6:19 Why Do We Need the DART Mission?

7:41 Conclusions

The fascinating Double Asteroid Redirection Test (DART) is a NASA space mission aimed at testing a method of planetary defense against near-Earth objects (NEOs). In September 2022, a certain space probe is set to deliberately crash into the minor-planet moon Dimorphos of the double asteroid Didymos to assess the future potential of a spacecraft impact to deflect an asteroid on a collision course with Earth through a transference of momentum.

DART is a joint project between NASA and the Johns Hopkins Applied Physics Laboratory (APL). It is being administered by NASA's Planetary Defense Coordination Office, and several NASA laboratories and certain offices are providing technical support. International partners, such as the space agencies of European Space Agency (ESA), Italian Space Agency (ASI), and JAXA Japan, are contributing to related or subsequent certain projects. In August 2018, NASA approved the project to start the final design and important assembly phase. The interesting DART spacecraft was successfully launched on 24 November 2021, with collision slated for 26 September 2022 to 2 October 2022. Check the news after the collision to see the results.

YouTube 上的“揭幕”頻道展示了 NASA 所擔心的事情。地球需要保衛。

所謂的雙小行星重定向測試（DART）很有趣。這是美國宇航局迄今為止最雄心勃勃的行星防禦項目之一，於 2021 年 11 月發射升空。 SpaceX 的負責人埃隆馬斯克甚至說它可以“為恐龍報仇”！這個內容豐富的視頻需要仔細看看。

Unveiled 為您提供非凡問題的令人難以置信的答案！

0:00 介紹

0:46 NASA DART 任務是什麼？

3:54 NASA 和國際合作夥伴

4:52 我們應該擔心嗎？

6:19 為什麼我們需要 DART 任務？

7:41 結論

引人入勝的雙小行星重定向測試 (DART) 是 NASA 的一項太空任務，旨在測試一種行星防禦近地天體 (NEO) 的方法。 2022 年 9 月，某個太空探測器將故意撞擊雙小行星 Didymos 的小行星衛星 Dimorphos，以評估航天器撞擊的未來潛力，通過動量轉移使小行星在與地球碰撞的過程中偏轉。

DART 是 NASA 和約翰霍普金斯應用物理實驗室 (APL) 之間的一個聯合項目。它由 NASA 的行星防禦協調辦公室管理，幾個 NASA 實驗室和某些辦公室正在提供技術支持。國際合作夥伴，例如歐洲航天​​局 (ESA)、意大利航天局 (ASI) 和日本宇宙航空研究開發機構的航天機構，正在為相關或後續的某些項目做出貢獻。 2018 年 8 月，NASA 批准該項目開始最終設計和重要組裝階段。有趣的 DART 飛船於 2021 年 11 月 24 日成功發射，碰撞時間定於 2022 年 9 月 26 日至 2022 年 10 月 2 日。請查看碰撞後的新聞以查看結果。

The First Thing That James Webb Will See - James Webb 看到的第一件事

The Secrets of the Universe on Youtube shows that the James Webb Space Telescope launched on 25 December 2021. As the world awaits the first images from the iconic space telescope, here is what the first year of observation will look like. It will still take up to 3 months for the telescope to return its first image. However, once it is fully deployed, the James Webb Space Telescope will certainly be the most powerful telescope at work.

Youtube 上的《宇宙的秘密》顯示，詹姆斯韋伯太空望遠鏡於 2021 年 12 月 25 日發射升空。當世界等待標誌性太空望遠鏡的第一批圖像時，這是第一年觀測的樣子。 望遠鏡返回第一張圖像仍需要長達 3 個月的時間。 然而，一旦完全部署，詹姆斯韋伯太空望遠鏡肯定會成為最強大的望遠鏡。

Revolutionary James Webb telescope blasts off into space 革命性的詹姆斯韋伯望遠鏡發射升空

DW News shows that a revolutionary telescope has been launched into space, marking the beginning of a new era of scientific exploration.

The James Webb telescope - named after a former head of NASA - lifted off on board a rocket from the European Space Agency's launch base in French Guiana. The launch is the culmination of several tough decades of work by European, Canadian and USA space agencies. Many call this the world's most powerful telescope.

It is nice to know that the launch went well (the thing did not explode or anything bad like that).

The $9bn observatory will seek out light from far away stars and galaxies, providing a glimpse into cosmic creation.

The $9bn observatory hurtled towards its destination 1.6 million km (1 million miles) away - or more than 4 times beyond the moon.

NASA’s James Webb Space Telescope certainly soared up from French Guiana on South America’s northeastern coast, riding a European Ariane rocket into the morning sky on Saturday.

The next step is for the telescope’s large mirror and sunshield need to unfurl. They were folded origami-style to fit into the rocket’s nose cone. A risk is taken with this mission - hopefully there will not be many errors.

Scientists are certainly going to be able to examine the atmospheres of various planets and determine whether or not planets could be habitable and suitable for humans to possibly one day colonise. It is also interesting if "any lifeform" could exist on a planet.

This is a successor to the ageing Hubble Space Telescope. The long-delayed James Webb is named after NASA’s administrator during the 1960s. NASA certainly partnered with the European and Canadian space agencies to build and launch the new 7-tonne telescope, with thousands of people from 29 countries successfully working on it since the 1990s.

All around the whole world, various astronomers certainly had eagerly waited to see Webb finally taking flight after years of setbacks. It seems that last-minute technical snags bumped the launch nearly a week, then gusty wind pushed it to Christmas. Transporting the thing means it is shaking, so it has to be checked for perfection. It is also shaking during the space flight, and then later the mirrors and parts have to be perfectly aligned.

It is certainly a launch for humanity.

It seems that the launch was a a beautiful launch and everything went off without a hitch.

The telescope’s main showpiece is a gold-plated mirror more than 6.5 metres (21 feet) across.

Protecting the observatory is a wispy, 5-layered sunshield, vital for keeping the light-gathering mirror and heat-sensing infrared detectors at cold subzero temperatures. At 21 by 14 metres (70 by 46 feet), it is the size of a tennis court.

The plan is for the sunshield to be opened 3 days after liftoff, taking at least 5 days to unfold and lock into place. Next, the mirror segments should open up like the leaves of a drop-leaf table, 12 days or so into the fascinating space flight.

For the entire mission, hundreds of release mechanisms need to work perfectly in order for the telescope to succeed. This is really like nothing NASA has ever done before.

德國之聲顯示，革命性的望遠鏡已經發射升空，標誌著科學探索新時代的開始。

詹姆斯韋伯望遠鏡——以美國宇航局前任負責人的名字命名——從歐洲航天局位於法屬圭亞那的發射基地登上火箭升空。這次發射是歐洲、加拿大和美國航天機構幾十年艱苦工作的結晶。許多人稱這是世界上最強大的望遠鏡。

很高興知道發射進展順利（這件事沒有爆炸或任何類似的壞事）。

耗資 90 億美元的天文台將尋找來自遙遠恆星和星系的光，讓人們一瞥宇宙的創造。

耗資 90 億美元的天文台飛向 160 萬公里（100 萬英里）外的目的地——或者說是在月球之外的 4 倍以上。

美國宇航局的詹姆斯韋伯太空望遠鏡確實從南美洲東北海岸的法屬圭亞那起飛，週六乘坐歐洲的阿麗亞娜火箭進入早晨的天空。

下一步是望遠鏡的大鏡子和遮陽板需要展開。它們被折疊成摺紙式以適應火箭的鼻錐。這個任務是有風險的——希望不會有太多錯誤。

科學家們肯定能夠檢查各種行星的大氣層，並確定行星是否適合居住和適合人類有朝一日殖民。如果“任何生命形式”可以存在於行星上，這也很有趣。

這是老化的哈勃太空望遠鏡的繼任者。拖延已久的詹姆斯韋伯以 1960 年代美國宇航局管理員的名字命名。美國宇航局當然與歐洲和加拿大航天機構合作建造和發射了新的 7 噸望遠鏡，自 1990 年代以來，來自 29 個國家的數千人成功地致力於它的工作。

全世界的天文學家肯定都迫不及待地期待著韋伯在經歷了多年的挫折後終於起飛。似乎最後一刻的技術障礙將發射推向了近一周，然後陣風將其推到了聖誕節。運輸東西意味著它在搖晃，所以必須檢查它是否完美。它在太空飛行過程中也在晃動，然後鏡子和零件必須完美對齊。

這無疑是對人類的一次發射。

看來這次發射是一次美麗的發射，一切都順利進行。

該望遠鏡的主要展示品是一面超過 6.5 米（21 英尺）的鍍金鏡子。

保護天文台的是一個纖細的 5 層遮陽罩，對於將聚光鏡和熱敏紅外探測器保持在零度以下的寒冷溫度中至關重要。它有 21 x 14 米（70 x 46 英尺），有網球場那麼大。

計劃是在升空後 3 天打開遮陽板，至少需要 5 天才能展開並鎖定到位。接下來，在進入迷人的太空飛行 12 天左右後，鏡面部分應該像落葉桌的葉子一樣張開。

對於整個任務，數百個釋放機制需要完美地工作才能使望遠鏡成功。這真的是 NASA 以前從未做過的事情。

Interesting Coronavirus Art Images 有趣的冠狀病毒藝術圖像

Dec 23, 2021 - The latest science is studying the important Omicron Coronavirus Variant. Two new British studies provide some certain early hints that the Omicron variant of the coronavirus may be milder than the Delta version.

Findings of these early important studies still have to be reviewed and proven. Maybe there is less severity, but Omicron spreads much faster than Delta and is more able to evade useful vaccines. Greater numbers of infections could overwhelm hospitals in the near future.

Certainly people are likely to have certain kind of some level of immunity at this stage of the pandemic, either through vaccination or a previous COVID-19 infection. Be careful out there and good luck.

Chinese:

2021 年 12 月 23 日 - 最新的科學正在研究 Omicron 冠狀病毒變體。 兩項新的英國研究提供了一些早期暗示，即冠狀病毒的 Omicron 變體可能比 Delta 版本更溫和。

這些早期研究的結果仍有待審查和證明。 也許嚴重程度較低，但 Omicron 的傳播速度比 Delta 快得多，並且更能夠逃避有用的疫苗。 在不久的將來，更多的感染可能會使醫院不堪重負。

當然，在大流行的這個階段，人們可能會通過疫苗接種或之前的 COVID-19 感染獲得一定程度的免疫力。 小心點，祝你好運。