Is Chandrayaan 2 landing on the Moon’s South Pole?

No.

Rachana, over on Twitter, asked why the CNN covered Chandrayaan 2’s Moon landing on September 7 as that of the second landing on the far side of the Moon rather than as the first polar landing by any country. Rachana is a space professional and her tweets earlier on space have been worth following. She has also written useful FAQs for students and young professionals interested in space science. At the end, I felt Rachana may have shared the tweet only with the intention of sharing the discussion on the Reddit post.

Based on this tweet, I asked Ram Ramgopal of CNN the reason for this coverage. I immediately felt lazy for not following up the question myself before asking Ram and hence went looking on Wikipedia. I recognized the error and informed Ram apologising for the complaint. I still had a few queries regarding the lunar poles that @zingaroo kindly answered. Also, if you follow the link to her tweet it goes to Reddit where Ohsin also responds to the question. I learnt that we are landing neither on the Moon’s pole nor on its far side. I am saving as reference what I learnt here.

The tilts of Earth and the Moon. Image: Peter Sobchak, Wikimedia Commons

On Earth, the polar region is defined by Earth’s tilt at 23.4 degrees. Hence, areas above the latitudes of 66.6 degrees are considered the polar region. I mapped the same onto the Moon. Here, is where @zingaroo corrected me. Moon’s tilt is only 6.68 degrees. Hence, the Moon’s polar region is only that North or South of 83.32 degrees. The Chandrayaan landing site is well outside the Moon’s poles.

As for the Moon’s far side, ISRO’s search for a landing site required the site to be on the near side of the Moon.

Published by Pradeep

I work in a public sector bank in Mumbai, India

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