'Christmas Star' to light up December sky first time in nearly 800 years; here's how and when you can view it

Would you like to view a cosmic wonder that is taking place the first time in nearly 800 years?

'Christmas Star' to light up December sky first time in nearly 800 years; here's how and when you can view it

A breathtaking cosmic wonder will be witnessed in December, the first time in nearly 800 years. The year has been a glum but as it is coming to an end, it has decided to part with a gift from the solar system.

Two of our solar system`s largest planets, Jupiter and Saturn, will look like double planet just after sunset on the evening of December 21, the beginning of the winter solstice. The two planets will line up to create what is known as the "Christmas Star" or "Star of Bethlehem".

A rare celestial treat awaits stargazers across the world. This is the first time the two gas giants will appear this closer to each other in nearly 800 years.

Stargazers in the northern hemisphere should turn their heads and telescopes to the southwest portion of the sky about 45 minutes after sunset to see the planets align on December 21. In reality, of course, the two planets won't be close at all. Jupiter is 5 au from Earth. Saturn is 10 au, but they will appear to be less than the diameter of a full moon apart.

"Alignments between these two planets are rather rare, occurring once every 20 years or so, but this conjunction is exceptionally rare because of how close the planets will appear to one another," Patrick Hartigan, Professor of Physics and Astronomy at Rice University in Houston, Texas, said in a statement.

"You`d have to go all the way back to just before dawn on March 4, 1226, to see a closer alignment between these objects visible in the night sky."

Although Jupiter and Saturn have been approaching one another in Earth`s sky since the summer, the two will be separated by less than the diameter of a full moon from December 16-25.

"On the evening of closest approach on December 21, they will look like a double planet, separated by only 1/5th the diameter of the full moon," said Hartigan.

"For most telescope viewers, each planet and several of their largest moons will be visible in the same field of view that evening." Though the best viewing conditions will be near the equator, the event will be observable anywhere on Earth, if the weather permits.

Those who prefer to wait and see Jupiter and Saturn this close together and higher in the night sky will need to stick around until March 15, 2080, Hartigan said.

After that, the two planets would not make such an appearance until sometime after the year 2400. As per Forbes, a star-sighting of this magnitude won't occur next again until the year 2080.

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The event sometimes referred to as The Great Conjunction, occurs roughly every 19 to 20 years, however, for the uninformed, these two planets haven’t appeared this (relatively) close together from Earth's vantage point since the Middle Ages. 

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