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HID lamps are used in high-performance bicycle headlamps, as well as flashlights and other portable lights, because they produce a great amount of light per unit of power. As the HID lights use less than half the power of an equivalent tungsten-halogen light, a significantly smaller and lighter-weight power supply can be used. HID lamps have ...
The Moon is spiraling away from Earth at a rate of 3.8 cm/year. [24] [42] This rate has been described as anomalously high. [43] The fluid core of the Moon was detected from the effects of core/mantle boundary dissipation. [44] The Moon has free physical librations that require one or more stimulating mechanisms. [45]
[dubious – discuss] [citation needed] Magnetic ballasts are simple devices compared to electronic ballasts. Essentially, a magnetic ballast is a large, heavy transformer coil that uses a simple principle to generate the high startup voltages needed to create an arc in a cold lamp. Input power is routed to a choke coil connected between the ...
Retroreflectors are devices which reflect light back to its source. Six were left at six sites on the Moon by three crews of the Apollo program, two by remote landers of the Lunokhod program, and one by the Chandrayaan program. [1] Lunar reflectors have enabled precise measurement of the Earth–Moon distance since 1969 using lunar laser ...
Humans have left over 187,400 kilograms (413,100 lb) of material on the Moon. Besides the 2019 Chang'e 4 and SLIM missions, the only artificial objects on the Moon that are still in use are the retroreflectors for the Lunar Laser Ranging experiments left there by the Apollo 11 , 14, and 15 astronauts, Chandrayaan-3 lunar lander, and by the ...
Sunlight reflects off objects on the moon the same way it does here on Earth. So all of these images and videos include light reflecting from Earth, the lunar module, and from the dust on the surface.
The moon will be a critical proving ground for our plans to travel farther into the solar system “The Moon could be a place for colonists to get their space legs before humans put down roots on ...
Made a closest approach of 1,950 kilometres (1,210 mi) on 18 September, and circled the Moon before returning to Earth. Landed in the Indian Ocean on 21 September at 16:08 UTC, becoming the first Lunar spacecraft to be recovered successfully and carried the first Earth life to travel to and around the Moon. [64] 63: Zond 6 (7K-L1 No.12L) Zond 6
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