Three things to know about the Blood Moon total lunar eclipse

Century’s longest lunar eclipse tonight All you need to know

When and where to watch the Blood Moon in Sweden

The lunar eclipse 2018 will happen tonight, marking the longest total such eclipse till 2123, i.e. for over 100 years.

Interestingly, some people feel that the longest lunar eclipse has its own disadvantages.

"If that were true, we'd be in big trouble given the gravitational pulls on Earth, Mars, and our moon!".

The full eclipse will begin at approximately 9:13 p.m. UTC, which is just 5:13 p.m. EST, making it impossible to see from anywhere in the United States, Canada, Central America, or Greenland. And that is why it's also known as the blood moon. First, there will be a total lunar eclipse and although uncommon, this one is special because it's going to last a lot longer than usual - in fact the longest this century. This will make the moon appear smaller than regular, and much smaller than it looks during the Super Moon (when the moon is at the closest point in its orbit from the Earth).

"For those new to astronomy, the evening may prove to be a mesmerising introduction to core scientific principles", said Dr Daniel Cunnama, science engagement astronomer at the SAAO.

"The moon is not always in ideal alignment with the sun and the Earth, so that is why we do not get a lunar eclipse every lunar cycle", Brad Tucker, an astronomer with the Australian National University's Research School of Astronomy and Astrophysics, said in a statement.

Lunar eclipses occur as the moon passes through Earth's shadow. Astronomers often talk about these events, characterized by two celestial bodies appearing very close together in the sky. The July 27/28, 2018 total lunar eclipse will follow a partial solar eclipse on that happened July 13, 2018.

If you are lucky, you may be able to catch some shooting stars associated with the Perseids, an annual meteor shower, while the Moon is totally eclipsed.

The celestial event, where the moon will line up with the Earth and the sun, will be seen across the United Kingdom and other parts of the Eastern hemisphere. The entire eclipse, including the penumbral and partial phases, will take six hours and 14 minutes from start to finish.

It's called Mars opposition, and the planet's peak brightness will linger for about a week. The eclipse will continue till 4.58 am, though the effect will not look as great.

"This total lunar eclipse will be primarily visible from the world's Eastern Hemisphere, which are Europe, Africa, Asia, Australia and New Zealand". This is partly because the moon is lower in the sky in the north, and partly because the northern light summer nights mean that the blood colour will not be as clearly visible.

The full moon will pass through the shadow of the Earth and for 103 minutes the moon will turn varying shades of red.

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