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Tuesday, December 1, 2020

Ending the month on a bang: 31 October to be graced by a blue moon – India Information , Firstpost

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It’s not doable to have a full moon in February because it has 28 days and 29 days throughout a bissextile year.

A full moon seen in Washington, USA. Picture credit score: Flickr/ Rocky Raybell

The phrase ”As soon as in a Blue Moon” is aptly suited to the month of October this yr, which is able to witness the uncommon prevalence of a second full moon, referred to as the ”Blue Moon”, on Saturday.
The standard month-to-month lunar phenomenon is that each month has one full moon and a brand new moon. Nonetheless, there are uncommon events when the identical month will get two full moons.

1 October noticed a full moon and the subsequent full moon falls on 31 October, mentioned Arvind Paranjpaye, director of Nehru Planetarium, Mumbai.

“When there are two full moons in a calendar month, the second full moon is named the Blue Moon,” he mentioned.

There’s a little bit of arithmetic concerned on this.

“Length of a lunar month is 29.531 days or 29 days, 12 hours, 44 minutes and 38 seconds. Subsequently, to have two full moons in a month, the primary full moon ought to happen on 1st or 2nd of the month,” Paranjpaye defined.

This further time accumulates over the months. After about 30 months there will likely be one further full moon within the yr, Paranjpaye mentioned.

He added that it’s also not doable to have a full moon in February because it has 28 days and 29 days throughout a bissextile year.

N Rathnashree, the director of Nehru Planetarium, Delhi mentioned the time period Blue Moon is a calendrical time period.

“It’s not too widespread to have a Blue Moon in a month of 30 days,” she mentioned.

The final Blue Moon in a month with 30 days was on June 30, 2007 and the subsequent one will likely be on September 30, 2050, Paranjpaye mentioned.

There have been two Blue Moons in 2018. The primary one was on January 31 and the second Blue Moon adopted on March 31. “This was as a result of the previous month February had solely 28 days,” Paranjpaye mentioned.

The subsequent Blue Moon will likely be on August 31, 2023, he added.

T V Venkateswaran, scientist with Vigyan Prasar, the communication wing of the Division of Science and Know-how, and an astronomy fanatic, mentioned this phenomenon is basically restricted to the Gregorian calendar which is getting used worldwide.

“You’ll not see the phenomenon of two full moons in a month in Islamic or Tibetan calendars or those which might be being adopted in giant elements of India as they’re based mostly on lunar actions,” Venkateswaran mentioned.

The phrase ”As soon as in a Blue Moon”, denoting one thing which doesn’t occur fairly often, got here from this phenomenon, Venkateswaran added.

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