India's Chandrayaan-3 and Russia's Luna-25: race to Moon's south pole heats up
New Delhi (PTI): The race to the uncharted south pole of the Moon is quickening with India's Chandrayaan-3 and Russia's Luna-25 gearing up for lunar landings next week, each mission holding significant implications beyond the thrilling competition in the skies.
While Chandrayaan-3 plans to be the first to land on the Moon's south pole, Luna-25's swift trajectory has cast new light, say experts as anticipation builds up. The proximity, possible overlap, of their landing dates -- August 21-23 for Luna-25 and August 23-24 for Chandrayaan-3 -- has intensified global scrutiny.
Chandrayaan-3, the third mission in India's lunar exploration series, began its journey on July 14 this year and successfully entered lunar orbit on August 5. It is meticulously adjusting its orbit in preparation for a soft landing attempt within 40 days of launch.
On Wednesday, its spacecraft successfully underwent a fifth and final lunar-bound orbit manoeuvre, taking it closer to the surface of the Moon. It has now completed all its Moon-bound manoeuvres and will now prepare for separation of the lander module -- comprising the lander and rover -- from the propulsion module.
Russia, which is making a momentous return to lunar exploration, its first in almost five decades since the iconic Soviet-era Luna-24 mission in 1976, launched Luna-25 on August 10. It is taking a more direct trajectory to the Moon, potentially allowing it to attempt a landing as early as August 21, about 11 days.
The rapid journey is attributed to the mission's lightweight design and efficient fuel storage, enabling it to take a shorter path to its destination.
"Will the race make a difference? In the grand scope of cosmic exploration, the order of arrival may not significantly alter the lunar landscape. Yet, the knowledge gained from each mission will enrich our understanding of the Moon's past and potential. The value lies in the sum of our combined efforts," Chrisphin Karthick, scientist at Bangalore's Indian Institute of Astrophysics, told PTI.
A key factor in the differing arrival times of the two missions is their respective mass and fuel efficiency. Luna-25 has a leaner lift-off mass of only 1,750 kilograms, significantly lighter than Chandrayaan-3's 3,800 kg. This reduced mass allows Luna-25 to accelerate more effectively, according to India's space agency ISRO.
Moreover, Luna-25's surplus fuel storage eliminates fuel efficiency concerns, enabling it to undertake a more direct route, explained former ISRO chairperson Dr K Sivan. In contrast, Chandrayaan-3's fuel-carrying capacity constraints required a more circuitous route to the Moon.
The spacecraft's orbit was incrementally increased through a series of manoeuvres before being slingshot towards the Moon, culminating in its lunar orbit nearly 22 days after launch.
A crucial factor affecting the timing of these spacecraft landings is the path of the sun across the sky, the scientists said. The sun needs to be rising over the spots these probes are set to touch down on.
"I'm pleased to see Russia also embarking on a Moon mission. Global participation in space exploration amplifies the human spirit of curiosity and discovery," Sivan told PTI.
"Both missions aim to touch down at the lunar south pole. While the order of arrival won't significantly impact the mission outcomes, it does reinforce the collective commitment to exploring new frontiers," he added.
The lunar landscape, he said, is unique and presents distinct challenges. The mission's success isn't solely determined by the order of landing.
"Lunar exploration demands higher thruster power and advanced technologies, each contributing to the overall success," Sivan said.
"Payload considerations are pivotal in mission planning. The quest for the lunar south pole demands precision, efficiency, and adaptability. India's mission showcases our dedication to achieving the highest thrust values, a testament to our technical prowess," he said.
At a time of renewed global interest in space exploration, India and Russia stand at the precipice of historical achievements, both countries shaping the trajectory of humanity's quest to uncover the secrets of Earth's celestial neighbour.
As the world watches, both missions are expected to provide groundbreaking insights into the Moon's composition, its history and potential as a resource-rich body.
Noting that healthy competition is a catalyst for growth, Karthick said the race to the lunar south pole fosters a dynamic environment where nations can learn from each other's achievements and setbacks.
"This competition ignites a spirit of innovation, pushing us to improve our spacefaring capabilities collectively."
"We are moving forward, adhering to our timeline. Our approach is grounded in sound physics that aligns with our economic reality. While cost-efficiency is a consideration, it doesn't deter us from reaching for the stars. Our goal is to fulfill the aspirations of our nation while adhering to responsible resource management," Karthick added.
The lunar south pole holds particular interest due to its potential water resources and unique geological features. The relatively unexplored region is pivotal for future lunar missions, including the upcoming Artemis-III mission by US space agency NASA, which aims to carry humans to the Moon after a five-decade hiatus.
"The uncharted terrain of the lunar south pole beckons us with the promise of unravelling more profound insights about our celestial neighbour. Our mission to the Moon is a testament to our resolve to explore the unknown." Karthick said.
"The south pole of the Moon offers a treasure trove of scientific opportunities. Investigating this region will yield valuable insights, contributing to our understanding of the Moon's history and evolution," he added.
Experts say the findings from these missions will not only enrich our understanding of the lunar environment but also pave the way for future lunar exploration endeavours.
"Through these missions, we will gain new technological capabilities that will expand our expertise in space exploration. Each mission holds the potential for groundbreaking science experiments that will broaden our understanding of the Moon's mysteries." Sivan said.
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Rupee rises 11 paise to 91.57 against the US dollar in early trade
Mumbai (PTI): The rupee gained 11 paise to 91.57 against the US dollar in early trade on Wednesday, supported by a retreating dollar index and the landmark India-EU trade deal.
Forex traders said the rupee opened higher as the US dollar index softened and a long-awaited trade breakthrough with Europe offered quiet reassurance.
At the interbank foreign exchange market, the rupee opened at 91.60 against the US dollar, then gained some ground to 91.57, registering a gain of 11 paise over its previous close.
On Tuesday, the rupee rebounded from its all-time low levels and gained 22 paise to close at 91.68 (provisional) against the US dollar.
In the initial trade, it also touched 91.66 against the American currency.
"The 92.00 level remains the key near-term pivot for USD/INR. A sustained move above this zone could open the way toward the 92.20–92.50 range," CR Forex Advisors MD Amit Pabari said.
Pabari further added that continued RBI presence in the market, combined with a softer dollar backdrop, may help stabilise the pair and gradually pull it back toward the 90.80–91.00 zone in the near term.
Meanwhile, the dollar index, which gauges the greenback's strength against a basket of six currencies, was trading 0.13 per cent lower at 96.09.
Brent crude, the global oil benchmark, was trading 0.53 per cent higher at USD 67.93 per barrel in futures trade.
On the domestic equity market front, the 30-share benchmark index Sensex jumped 646.49 points to 82,503.97 in early trade, while the Nifty surged 196.7 points to 25,372.10.
Foreign Institutional Investors offloaded equities worth Rs 3,068.49 crore on Tuesday, according to exchange data.
Meanwhile, India and the European Union on Tuesday announced the conclusion of negotiations for the free trade agreement (FTA), under which a number of domestic sectors such as apparel, chemicals and footwear will get duty-free entry into the 27-nation bloc, while the EU will get access to the Indian market at concessional duty for cars and wines, an official said.
The deal has been dubbed the "mother of all deals" as it will create a market of about 2 billion people.
"This agreement follows recent trade pacts with Britain, New Zealand, and Oman. While challenges remain - especially with high US tariffs on Indian exports - the EU deal sends a strong signal of India's growing role in global trade," Pabari added.
