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Presenting the Billion Dollar Question: Why did, it require 40 days, for the Chandra yaan-3 Lunar Exploration mission to reach the Southern pole of the Moon? In contrast, China's Chang'e 2, launched in 2010, only took four days to cover the distance between Earth and the Moon. The Soviet Union's Luna-1, the pioneering unmanned mission that came close to the Moon, accomplished the journey in a mere 36 hours. Even Apollo 11's command module, Columbia, which carried three astronauts, reached the Moon in just slightly over four days. Well, the I S R O program, has a budget of just $75 million , which is the main reason they have to use the ingenious method to lower cost by implementing the gravitational pull of the moon and the earth, to get to it's destination because of it's Less powerful rockets. The Chinese Chang e 2 cost around $219 Million, adjusted to inflation, it's over $316 million The Soviet Union Luna 1 in the 1960s cost around $200 million, when adjusted to inflation. The estimated cost of the Soviet Union, Luna program in 1964 was , 6 to $10 billion. And the most Ambitious program, Apollo 11! cost a staggering $25 Billion, during the 1960s and when adjusted to present-day, inflation it’s around $200 Billion.