নাসার OSIRIS-REx মিশন গ্রহাণু বেন্নু থেকে পৃথিবীতে নমুনা নিয়ে এসেছে  

নাসা’s first asteroid sample return mission, OSIRIS-REx, launched seven years ago in 2016 to near-পৃথিবী asteroid Bennu has delivered the asteroid sample that it collected in 2020 to পৃথিবী 24 উপর^th September 2023. After releasing the asteroid sample into পৃথিবীর atmosphere, the spacecraft embarked on its extended travel to asteroid Apophis as OSIRIS-APRX mission. The asteroid Bennu is an ancient carbonaceous asteroid that has rocks and dusts from the birth of the solar system. Study of the returned sample shall throw light on how গ্রহ were formed and how life began on পৃথিবী. More importantly, there is small risk of Bennu impacting with পৃথিবী late next century between the years 2175 and 2199. Results from OSIRIS-REx mission will help refine the predicted path of the asteroid Bennu as well as of other potentially hazardous asteroids to plan and execute mitigation.  

নাসা’s asteroid sample return mission OSIRIS-REx has successfully brought a sample weighing about 250 grams from the asteroid Bennu. The capsule of rocks and dust collected from the asteroid in 2020 landed at Utah site near Salt Lake City in the USA on Sunday 24^th সেপ্টেম্বর 2023  

OSIRIS-REx was নাসা’s first asteroid sample return mission.  

নাসা’s first asteroid sample return mission, OSIRIS-REx (acronym for “Origins, Spectral Interpretation, Resource Identification and Security – Regolith Explorer”) was launched to the near-পৃথিবী asteroid Bennu on 8^th সেপ্টেম্বর 2016. এটি 20 তারিখে গ্রহাণুর পৃষ্ঠ থেকে পাথর এবং ধুলোর একটি নমুনা সংগ্রহ করেছিল^th October 2020 and started its return journey to পৃথিবী 10 উপর^th মে 2021। নমুনা রিটার্ন ক্যাপসুল মহাকাশযান থেকে বিচ্ছিন্ন হয়ে পৃথিবীতে প্রবেশ করার সময় এটি পৌঁছাতে তার ফিরতি যাত্রায় আড়াই বছর ভ্রমণ করেছিল। বায়ুমণ্ডল. With this, the spacecraft completed a seven-year journey and the mission OSIRIS-REx, the first U.S. mission to collect a sample from an asteroid, was completed. But the journey of spacecraft continues towards asteroid Apophis as OSIRIS-APEX mission after releasing sample return capsule into পৃথিবীর বায়ুমণ্ডল।   

NASA এর OSIRIS-REx মিশনের সময়রেখা 

Discovered in September 1999 and named after an ancient Egyptian deity, asteroid Bennu is a near-Earth কক্ষপথ, ancient asteroid thought to have formed over 4.5 billion years ago in the early phase of solar system’s history. It is a B-type, carbonaceous asteroid that has rocks and dust from the birth of the solar system. It may also have material containing molecules that were present when life first formed on Earth. Asteroids rich in Organics are thought to have played a role in catalysing life on Earth. The study of the sample brought from the asteroid Bennu is expected to throw light on how গ্রহ were formed and how life began.  

As a near-Earth object (NEO), Bennu is a potentially hazardous asteroid as it may impact Earth late in next century between the years 2175 and 2199 though the probability of such an event is low. The exact path of rotating asteroids (such as Bennu) through the solar system is little unpredictable due to Yarkovsky effect (heating up of surfaces during the day and cooling down at night gives of radiation that may act like a mini thruster to drift the asteroid away over time). The measurement of the Yarkovsky Effect by OSIRIS-REx will help refine the predicted কক্ষপথ of the asteroid Bennu as well as of other potentially hazardous asteroids and help in গ্রহ প্রতিরক্ষা.  

Under the renamed mission OSIRIS-APEx, the spacecraft is now travelling towards another near-Earth asteroid Apophis (about 1,000 feet wide) which will approach Earth within the range of about 20,000 miles in 2029. At that time, the spacecraft will enter the কক্ষপথ of Apophis to investigate how “close approach to Earth” affected its কক্ষপথ, spin rate, and surface. This knowledge will help in dealing with “close approach of asteroid Bennu” in late next century.  

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সোর্স: 

1. নাসার প্রথম গ্রহাণু নমুনা অবতরণ করেছে, এখন পরিষ্কার ঘরে নিরাপদ। 24 সেপ্টেম্বর, 2023 প্রকাশিত। এ উপলব্ধ https://www.nasa.gov/press-release/nasa-s-first-asteroid-sample-has-landed-now-secure-in-clean-room . 25 সেপ্টেম্বর 2023 এ অ্যাক্সেস করা হয়েছে।  

2. OSIRIS-REx মিশন। এ উপলব্ধ https://www.nasa.gov/mission_pages/osiris-rex/about https://www.nasa.gov/content/osiris-rex-mission-operations 25 সেপ্টেম্বর 2023 এ অ্যাক্সেস করা হয়েছে। 

3. OSIRIS-REx মহাকাশযান নতুন মিশনের জন্য রওনা হয়েছে। এ উপলব্ধ https://blogs.nasa.gov/osiris-rex/2023/09/24/osiris-rex-spacecraft-departs-for-new-mission/ 25 সেপ্টেম্বর 2023 এ অ্যাক্সেস করা হয়েছে। 

4. বেন্নু সম্পর্কে জানার দশটি জিনিস। এ উপলব্ধ https://www.nasa.gov/feature/goddard/2020/bennu-top-ten 25 সেপ্টেম্বর 2023 এ অ্যাক্সেস করা হয়েছে। 

5. গ্রহাণু এবং ধূমকেতু ওয়াচ। এ উপলব্ধ https://www.nasa.gov/mission_pages/asteroids/overview/index.html 25 সেপ্টেম্বর 2023 এ অ্যাক্সেস করা হয়েছে। 

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