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After the Chandrayaan-2 lander's unsuccessful attempt to soft-land on Moon's surface, the Indian Space Research Organisation (ISRO) has decided to make a major design change in the lander of its next proposed lunar mission Chandrayaan-3, reports Times of India. The Indian space agency is expected to launch its third mission to Moon in 2021. The overseeing committee of the mission has reportedly finalised a design change after which the lander will have just four engines, as opposed to the five engines on Chandrayaan-2's Vikram lander. The committee has decided to drop the fifth engine that was added last minute on Vikram lander and the lander for next moon mission will now have only four engines, a scientist was quoted in the report as saying. The committee has also suggested a minor modification on the legs of the lander but it was yet to be approved, another scientist said. It has also been decided to include the laser doppler velocimeter (LDV) for better measurement of speed during landing. Besides, improvement in power and communication systems, changes in software and algorithms have also been proposed for the upcoming mission. According to the report, ISRO's move to drop the fifth/central engine is the latest on the mission and is significant as this additional engine was added to Vikram lander after simulations found it to be crucial for dealing with dust storms that could have been kicked up when the lander nears the lunar surface, affecting its stability. ISRO chairman K Sivan was quoted in the report as saying that earlier analysis had estimated that the dusts would cause trouble but now the space agency's analysis has shown that it would not be a problem. After the new analysis, it was decided to remove the fifth engine from the lander. It should be noted that unlike the Chandrayaan-2, which carried an Orbiter, lander and rover, the Chandrayaan-3 will only carry a lander and rover. An Appeal... Dear Reader, As you are no doubt aware, Swarajya is a media product that is directly dependent on support from its readers in the form of subscriptions. We do not have the muscle and backing of a large media conglomerate nor are we playing for the large advertisement sweep-stake. Our business model is you and your subscription. And in challenging times like these, we need your support now more than ever. We deliver over 10 - 15 high quality articles with expert insights and views. From 7AM in the morning to 10PM late night we operate to ensure you, the reader, get to see what is just right. Becoming a Patron or a subscriber for as little as Rs 1200/year is the best way you can support our efforts.
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चन्द्रमामा एसरि अडिएको फेला पर्यो विक्रम ल्याण्डर, भदौ २२ , एजेनसी – भारतीय अन्तरिक्ष अनुसन्धान केन्द्र (इसरो) ले चन्द्रयान,२ ल्याण्डर विक्रम चन्द्रमाको सतहमा फेला पार्न सफल भएको छ । सिवनले ल्याण्डर अवतरण भएको पत्ता लागेपनि त्यो कुन अवस्थामा रहेको छ भन्ने अझै यकिन नभएको बताएका छन् । इसरोका अध्यक्ष डा. के सिवनले आइतबार चन्द्रमामा विक्रम ल्याण्डर अवतरण भएको स्थानमा पत्ता लागेको जानकारी दिएका हुन् । हार्डल्यान्डिङ भएको तर ल्याण्डरमा क्षति पुगेको वा नपुगेको भने अझै स्पष्ट नभएको उनले बताए। अर्बिटरले ल्याण्डरको केही तस्विर (थर्मल इमेज) खिचेको छ । यद्यपि, अर्बिटरद्वारा लिइएको ल्याण्डरको तस्विर इसरोसम्म आइपुगेको छैन । विक्रमसँग सम्पर्क कायम गर्न अझै पनि प्रयास जारी रहेको छ । इसरो ७ सेप्टेम्बरमा अन्तरिक्ष विज्ञानमा इतिहास रच्ने नजिक थियो । तर, चन्द्रयान–२ को ल्याण्डर विक्रमको ल्याण्डिङभन्दा मात्र ६९ पहिलो पृथ्वीसँग सम्पर्क टुटेको थियो । चन्द्रमाको दक्षिणी ध्रुवमा ल्याण्डर विक्रमको शनिबार बिहान भारतीय समयअनुसार १ बजेर ५३ मिनेटमा ल्यान्डिङ हुनुपर्ने थियो ।यसपछि सिवनले भारतीय मिसन ९९ प्रतिशत सफल भएको र अन्तिम चरणमा ल्याण्डरसँग सम्पर्क टुटेको बताएका थिए । ल्याण्डर’लाई सुरक्षित रुपमाचन्द्रमामा अवतरण गराउने क्रममा सम्पर्क टुटेपछि प्रधानमन्त्री नरेन्द्र मोदीले अन्तरिक्ष संस्थान ‘इन्डियन स्पेस रिसर्च अर्गनाइजेसन’ (इसरो)मा राष्ट्रको नाममा सम्बोधन गरेका थिए । उनले देशको नाममा सम्बोधन गर्दै आफ्नो अन्तरिक्ष वैज्ञानिकलाई चन्द्रयान–२ अन्तिम समयमा सम्पर्कविहिन भएको र त्यसमार्फत पूर्वनिर्धारित लक्ष हासिल नभएकोमा चिन्तित नहुन आग्रह गरेका हुन् ।