What is Super Blue Moon? Observed on January 31 to Mark Last of Trilogy (Download PDF)


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The January 31 full moon was special due to three reasons- it was last in a trilogy of “supermoons”, it is about 14 per cent brighter than usual and is the second full moon of the month, commonly known as a “blue moon”, which happens every two and a half years, on average.

Image of Super blue blood moon

Image of Super Blue Blood Moon

Image of Super blue blood moon

What is a Supermoon?

  • A supermoon is a new or full moon closely coinciding with perigee.

  • A super moon looks larger and brighter than usual.

 Image of Supermoon

Image of Supermoon

Image of Supermoon

What is Perigee?

  • The moon’s closest point to Earth in its monthly orbit is known as perigee.

When Were First and Second Supermoons of the Trilogy Seen?

The first two supermoons of the trilogy were seen on 3rd December 2017 and 1st January 2018

What is Blue Moon?

  • When there are two full moons in a month, it is commonly known as a “blue moon”.

  • It happens every two and a half years, on average.

Other Specialties of Moon on January 31, 2018

  • The super blue moon will pass through earth’s shadow to give viewers in the right location a total lunar eclipse.

  • The moon will be in the earth’s shadow, showing a reddish tint, so known as a “blood moon”, which can be viewed from western North America across the Pacific to Eastern Asia.

  • North America, Alaska, and Hawaii, can see the eclipse before sunrise on January 31.

  • Middle East, Asia, eastern Russia, Australia and New Zealand, can see the “super blue blood moon” can be seen during moonrise in the morning on the 31st January 2018.

- Published/Last Modified on: February 16, 2018

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