Don't miss your date with century's longest Lunar Eclipse today..

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New Zealanders are about to witness a rare celestial event - a selenelion.

"Moon is going around the earth in elliptical orbit". And what about other types of eclipses?

A super blood moon in Malmö in 2015.

Astrophysics professor Tim O'Brien said: "You need to have a clear south-eastern horizon as the moon comes up so we low-down in the south-east". The effect of the atmosphere is to bend the light from each celestial object by about half a degree, which also happens to be their apparent diameters in the sky. A "blood moon" is a colloquial term for a lunar eclipse.

Lunar eclipse: Watch onlineThis chart shows which phases of the lunar eclipse will be seen from which parts of the world.

When will I get a chance to see a blood moon again? This eclipse is a total lunar eclipse, which means it will be particularly red.

A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth, according to NASA. Only the light with longer wavelength - with red, orange and yellow colors - makes it through and it illuminates the moon. The duration of the eclipse in Pakistan is expected to be six hours and 14 minutes.

"It will be the century's longest lunar eclipse, with a whopping one hour and 43 minutes, in totality".

"Sometimes, the moon passes through the lighter part of Earth's shadow, causing a penumbral eclipse and total eclipse occur when the Earth completely block Sun rays from reaching the moon", he said. The full eclipse will go for more than 6 hours.

A lunar eclipse typically happens no more than three times in any given location a year when the earth, sun and moon align and the moon falls in the shadow of the earth.

Solar eclipses are a rarer sight in NZ.

Ancient Mesopotamians believed that a lunar eclipse was an attack on their king.

Total lunar eclipse will be visible throughout most of Asia (including Qatar), Africa, Europe, Australia, Southern America, and parts of Northern America.

The totality of this lunar eclipse will last about an hour and 43 minutes, but a partial eclipse before and after the total phase will each last an hour and six minutes - which means the moon will spend almost four hours crossing the Earth's shadow.

First, let's talk about Mars: Due to the alignment of Earth's 12-month orbit and Mars' 26-month orbit, there's wide variation in the distances between the two planets.

What is Total Lunar Eclipse?

It should be noted the over-enthusiastic doomsday preacher did not say July 27 will be the end of the world - just the beginning of one. It is nearly the longest lunar eclipse theoretically possible, and will be the longest eclipse between 2001 to 2100.

The places a selenelion can be seen are limited because everything must line up.

Those up the top of the country won't be able to see it. This is an eclipse of the moon.