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China Aims to be First to Land on 'dark side' of Moon

May 21, 2015     Email"> PrintText Size

China is planning to land its Chang'e-4 probe on the moon's "dark side", which has never before been explored, Wu Weiren, the chief engineer for China's Lunar Exploration Program told Chinese Central Television.

"We probably will choose a site on which it is more difficult to land and more technically challenging…Our next move will probably see some spacecraft land on the far side of the moon," Wu said.

The "dark" side of the moon is not actually dark — it receives just as much sunlight as the hemisphere that can be seen from Earth.

The reason that the dark, or far, side of the moon, never faces Earth is a phenomenon known as "tidal locking." Over the course of millions of years the Earth's gravity slowed the moon's rotation, matching it to the speed of its orbit.

The Soviet probe Luna 3 was first to photograph the dark side in 1959 and astronauts on the Apollo 8 mission were the first humans to see it. Since then, it's been photographed by various probes, most recently the Lunar Reconnaissance Orbiter.

China's lunar exploration program, named after the mythological moon goddess Chang'e, is divided into three stages: orbiting, landing and return.

China launched its first lunar probe, Chang'e-1, on Oct 24, 2007, from the southwestern Sichuan province. The probe ended its 16-month mission on March 1, 2009, when it crashed into the moon's surface. The second probe, Chang'e-2, was launched the following year.

Chang'e 3, launched in 2013, marked the completion of the second stage of the country's lunar program. It landed on the moon and was the first spacecraft to do so safely since the Soviet probe Luna 23 in 1976.

Chang'e-4, set to launch in 2020, will orbit the moon before sending a rover to the surface — possibly on the so far unexplored far side for the first time. (China Daily)

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(Editor: CHEN Na)

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