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Queqiao: The bridge between Earth and the far side of the moon 5nvklj





Queqiao: The bridge between Earth and the far side of the moon 9tpt39

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Queqiao: The bridge between Earth and the far side of the moon

Dragon
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Queqiao: The bridge between Earth and the far side of the moon Empty Queqiao: The bridge between Earth and the far side of the moon

Post by Dragon Mon Jun 14, 2021 3:50 am

China's Chang'e-4 probe marked the first soft-landing of a spacecraft on the far side of the Moon, which always faces away from Earth. To communicate with ground stations, Chang'e-4 relies on Queqiao, a relay communication satellite that orbits a point behind the Moon and bridges Earth and Chang'e-4.

Because of a phenomenon called gravitational locking, the Moon always faces the Earth from the same side.

This proved useful in the early lunar landing missions in the 20th century, as there was always a direct line of sight for uninterrupted radiocommunications between Earth ground stations and equipment on the Moon.

However, gravitational locking makes exploring the hidden face of the moon—the far side—much more challenging, because signals cannot be sent directly across the Moon towards Earth.


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Queqiao: The bridge between Earth and the far side of the moon 334pu7m
Dragon
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Queqiao: The bridge between Earth and the far side of the moon Empty Re: Queqiao: The bridge between Earth and the far side of the moon

Post by Dragon Mon Jun 14, 2021 3:52 am

Queqiao: The bridge between Earth and the far side of the moon Queqiao-the-bridge-bet
Credit: Space: Science & Technology

The far side of the Moon always faces away from the Earth, making communications from lunar equipment there much more challenging.

Fortunately, relay communication satellites can act as a bridge or stepping stone between transmission from the far side towards Earth ground stations.


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Queqiao: The bridge between Earth and the far side of the moon 334pu7m
Dragon
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Queqiao: The bridge between Earth and the far side of the moon Empty Re: Queqiao: The bridge between Earth and the far side of the moon

Post by Dragon Mon Jun 14, 2021 3:53 am



China Releases 12min Video of Chang'e-4's Soft Landing on Moon's Far Side


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Queqiao: The bridge between Earth and the far side of the moon 334pu7m

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    Current date/time is Sat Oct 23, 2021 11:59 am