Astronomers across India are gearing up for a spectacular celestial event as the longest total lunar eclipse since 2022 will grace the night sky on September 7-8, 2025. This will be the first time since July 27, 2018, that a total lunar eclipse will be visible in its entirety from all parts of the country, according to experts from the Astronomical Society of India (ASI). “You will have to wait until December 31, 2028, for the next one,” said Divya Oberoi, Associate Professor at the National Centre for Radio Astrophysics, Pune, and chair of ASI’s Public Outreach & Education Committee (POEC).

A lunar eclipse occurs when Earth aligns between the Sun and Moon, casting its shadow on the lunar surface. The event begins with a penumbral eclipse at 8:58 pm on September 7, when the Moon enters Earth’s faint outer shadow, the penumbra, which is challenging to observe without binoculars or a telescope, explained Niruj Mohan Ramanujam, Head of the Science, Communication, Public Outreach and Education (SCOPE) Section at the Indian Institute of Astrophysics. The partial eclipse, visible to the naked eye, starts at 9:57 pm as the Moon enters the darker umbral shadow.

The total eclipse phase, from 11:01 pm to 12:23 am on September 8, lasting 82 minutes, will transform the Moon into a striking coppery-red hue. “This occurs because red sunlight filters through Earth’s atmosphere, illuminating the Moon while blue light scatters,” said B.S. Shylaja, former Director of Jawaharlal Nehru Planetarium, noting that atmospheric conditions will influence the shade. The partial phase ends at 1:26 am, with the eclipse concluding at 2:25 am.

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Unlike solar eclipses, lunar eclipses are safe to view with the naked eye, binoculars, or telescopes, making this a perfect opportunity for skywatchers. Astronomy clubs and institutions across India are hosting public viewing events, with details and livestream links available at https://bit.ly/eclipseindia, as shared by Mohan, POEC co-chair.

Addressing cultural misconceptions, astronomers emphasized that lunar eclipses are harmless shadow phenomena, debunking superstitions about avoiding food, water, or activity, or risks to pregnant women. “These beliefs have led to unfortunate incidents in the past. It’s perfectly safe to enjoy this magnificent spectacle,” Mohan urged, advocating for scientific awareness.

This rare event promises to unite enthusiasts and dispel myths, offering a breathtaking glimpse into the wonders of the cosmos.

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