Stargazers are being treated to a once-in-a-lifetime celestial event, as Jupiter and Saturn make their closest alignment since the 17th century.

The two largest planets in our solar system have been inching closer together since September, culminating in what is known as the "Great Conjunction".

While they do pass one another every 20 years as they circle the sun, Jupiter and Saturn have not been this closely aligned in the night sky for centuries.

Al Jazeera's Tony Cheng reports from Chachoengsao in Thailand.

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