MEXICO: People in the city will get to see a total lunar eclipse early next month. It will be the third in a series of four and the last in the series to be visible in the city.
Taking place on April 4, the total eclipse will start at around 7.54pm and end at 8.06pm.
It is part of what is called a tetrad eclipse, an astronomical event of four consecutive total lunar eclipses, with six full moons between each of them.
The tetrad started on April 15 last year. The last was on October 8 and the final one – which will not be visible here – will occur on September 28.
Astronomy lovers will have to wait 17 years if they miss this tetrad, as the next one will not occur until 2032.
The last tetrad eclipse occurred from 2003 to 2004.
The moon will appear dull red in colour, but will not completely vanish during the eclipse.
The phenomenon results from the scattering of the blue part of sunlight by the earth’s atmosphere and the remaining red light being refracted onto the moon.
Lunar eclipses happen when the moon enters the earth’s shadow. If it is fully immersed in the shadow, a total eclipse occurs. Partial eclipses happen when part of the moon falls under the earth’s shadow.
If the weather is clear enough, the event will be visible in eastern and southeastern parts of Hong Kong, such as Shek O, the east dam of High Island Reservoir and the top of Tai Mo Shan.
The Space Museum will organise a free observation activity along the middle section of the Avenue of Stars in Tsim Sha Tsui from 6.45pm.
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