A blue moon occurs once every two to three years. This is because the average length of a month is about 29.5 days, which is very close to the lunar cycle of about 29.53 days.

The moon has turned shades of blue in the past, writes NASA, but it's an extremely rare event. When it does happen, experts say it's because of water particles hurled into the atmosphere often by ...

When is the super blue moon? The super blue moon will be visible Wednesday, according to the National Oceanic and Atmospheric Administration. At 9:36 p.m. EDT, it will reach its peak.

In general, a blue moon happens once every two or three years on average, according to NASA. The time between super blue moons can be as much as 20 years – but generally, 10 years is the average.

The Americas last saw a blue moon in March 2018. A full Blue Moon is seen on March 31, 2018, in Millburn, New Jersey. Rich Graessle/Icon Sportswire via Getty Images ...

During the early hours of Jan. 31, there will be a full moon, a total lunar eclipse, a blue moon and a supermoon – all at the same time. None of these things is really all that unusual by itself.

What To Watch For A blue supermoon won’t happen again until January and March 2037, according to NASA. Blue supermoons take place an average of 10 years apart, though the last one was seen more ...

On March 31, much of the world will get to see a rare event: A second blue moon in one year. It'll be the second blue moon of 2018 — at least, according to one definition of the term.

The last time a blue moon coincided with New Year's Eve was in 1990. The next opportunity will come in 2028. Partial Eclipse New Year's Eve Top 10 Amazing Moon Facts Gallery: The Moon ...

A blue moon is the second of two full moons in a month – but it can also be the third of four full moons during a single season. In this case, it’s the third of four full moons this spring.