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Home / Science / China's "Fake Moons" Could Make Light Pollution Almost Fifty Times Worse, Warns Astronomer

China's "Fake Moons" Could Make Light Pollution Almost Fifty Times Worse, Warns Astronomer




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Jiutian traditional tower illuminated at night with full moon in the background, Chengdu, China

A city in China is planning to launch a satellite planned to be eight 47.

As reported by the People's Daily Online, scientists in the city of Chengdu in southwest China

When might the "fake moons" launch? [1

9659003] Wu Chunfeng, chairman of Chengdu Aerospace Science and Technology Microelectronics Systems Research Institute Co (CASX) said that the satellite would complement moonlight., China Daily reported that three man-made moons will be launched in 2022. "By then, the three huge mirrors will divide the 360-degree orbital plan, realizing illuminating an area for 24 hours continuously," it quoted Wu as saying. "Using man-made moon to illuminate an area 50 square miles can save 1.2 billion yuan of electric charge." That's around US $ 172 million.

 

Why are "fake moons" such a bad idea?

"The Chengdu 'artificial moon' would have the effect of increasing the nighttime brightness of an already light-polluted city, creating problems for both Chengdu's residents, who are unable to screen out the unwanted light, as well as for the urban wildlife population that can not just go inside and close the shutters, "John Barentine, Director of Public Policy at the International Dark-Sky Association , Forbes . "This seems to be a new approach to an already solved problem."


  

Exactly how bright will the "fake moons" be?

The People's Daily Moon could be eight times that of the real moon. How bright is moonlight ?, found the brightest possible Full Moon under ideal conditions at about 0.3 lux, but it's often just 0.15-0.2 lux. 1.6 million lux, "says Barentine, author of The Lost Constellations: A History of Obsolete, Extinct, or Forgotten Star Lore. He adds that although it is difficult to calculate the luminance of the Chinese satellites without knowing the size of their reflecting surfaces, that 1.6 lux were uniformly emitted by the entire sky (solid angle = 2π steradians), then it would be equivalent to a sky brightness of 1.6 / (2π) = 255 mcd / m2, or about 14.1 magnitudes per square arcsecond.

Why fake moons would cause a lot more light pollution

Stargazers already avoid a full moon because its light pollution makes it harder to see, but fake moons will cause much more light pollution than anyone is saying, according to Barentine. "F or purposes of comparison, the sky brightness over central Chengdu due to skyglow is 5.43 mcd / m2, or about 18.25 magnitudes per square arcsecond, using satellite data obtained in 2015," he says. Assuming that light is radiated uniformly across the night sky, that represents an illuminance of about 0.00543 cd / m2 * 2π steradians = 0.034 lux (calculations by Barentine). "Thus, the 'artificial moon' would increase the illumination of the ground by a factor of about 47," he says.

A full moon near the Chinese flag (AP Photo / Ng Han Guan)

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Back in 1993, Russia tested a "space mirror", but in the 1920s German scientist, Hermann Oberth flooded the idea of ​​space station from which a 100m wide concave mirror could be used to reflect sunlight onto a specific place on Earth. World War II.

What is International Observe The Moon Night?

The "fake moons" idea comes as NASA prepares to mark "International Observe The Moon Night" on Saturday. An annual event across the globe at the time of writing there were 761 moon-gazing events planned, including at 19:30 p.m. at the Intrepid Sea, New York Air & Space Museum, where NASA's Ernie Wright wants to speak. Others include from 19:00 p.m. at the Los Angeles University of California, where telescopes will be set up at the UCLA Math Sciences Building Rooftop (9th Floor), and at Lowell Observatory in Flagstaff, Arizona.

Next year's "International Observe The Moon Night "event will happen on October 5, 2019.

Wishing you clear skies and wide eyes

If you enjoyed this article, you might also like:

What Einstein Wrong? Tomorrow Begins A Seven-Year Quest For Mercury To Refine Spacetime

This Weekend The Trillion Star Andromeda Galaxy Will Be Brilliant Best

Missed The Perseids? Here's How To See The Next Great Meteor Shower Of 2018

Here's How To See All Eight Planets In One Night This Week

Follow me on Twitter @jamieacarter @TheNextEclipse or read my other Forbes articles via my profile page.

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Jiutian traditional tower illuminated at night with a full moon in the background, Chengdu, China

A city in China is about to launch a full moon to illuminate 47.

As reported by the People's Daily Online, scientists in the city of Chengdu in southwest China think they may be able to cut streetlights by: urban streets at night, but one astronomer thinks that it could be Launching on "illumination satellite"

When might the "fake moons" launch?

The plans for 202o were outlined by Wu Chunfeng, Chairman of Chengdu Aerospace Science and Technology Microelectronics Systems Research Institute Co (CASX) said that the satellite would complement moonlight. However, China reported that three man-made moons will be launched in 2022. "By th the three huge mirrors wants to divide the 360-degree orbital plan, realizing illuminating an area for 24 hours continuously, "it quoted Wu as saying. "Using man-made moon to illuminate an area 50 square miles can save 1.2 billion yuan of electric charge." That's around US $ 172 million.

Why are "fake moons" such a bad idea?

"The Chengdu 'artificial moon' would have the effect of increasing the nighttime brightness of an already light-polluted city Chengdu's residents, who are unable to screen out the unwanted light, as well as the urban wildlife population, can not just go inside and close the shutters, "John Barentine, director of Public Policy at the International Dark -Sky Association, Forbes . "

Exactly how bright the" fake moons "be?

The brightest moonlight in the world." How bright is moonlight ?, found that the brightest possible fullMoon under ideal conditions has an illuminance of about 0.3 lux, but it's often just 0.15-0.2 lux. 1.6 million lux, "says Barentine, author of The Lost Constellations: A History of Obsolete, Extinct, or Forgotten Star Lore. He adds that although it is difficult to calculate the luminance of the Chinese satellites without knowing the size of their reflecting surfaces, that 1.6 lux were uniformly emitted by the entire sky (solid angle = 2π steradians), then it would be equivalent to a sky brightness of 1.6 / (2π) = 255 mcd / m2, or about 14.1 magnitudes per square arcsecond.

Why fake moons would cause a lot more light pollution

Stargazers already avoid a full moon because its light pollution makes it harder to see, but fake moons will cause much more light pollution than anyone is saying, according to Barentine. "F or purposes of comparison, the sky brightness over central Chengdu due to skyglow is 5.43 mcd / m2, or about 18.25 magnitudes per square arcsecond, using satellite data obtained in 2015," he says. Assuming that light is radiated uniformly across the night sky, that represents an illuminance of about 0.00543 cd / m2 * 2π steradians = 0.034 lux (calculations by Barentine). [5Han5thethethethethethethethemoonmoonmoonmoonmoonmoonmoonmoonmoonmoonmoonmoonmoonmoonmoon47474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747474747[19939014]

Back in 1993, Russia tested a "space mirror", but in the 1920s German scientist, Hermann Oberth flooded the idea of ​​space station from which a 100m wide concave mirror could be used to reflect sunlight onto a specific place on Earth. World War II.

What is International Observe The Moon Night?

The "fake moons" idea comes as NASA prepares to mark "International Observe The Moon Night" on Saturday. An annual event across the globe at the time of writing there were 761 moon-gazing events planned, including at 19:30 p.m. at the Intrepid Sea, New York Air & Space Museum, where NASA's Ernie Wright wants to speak. Others include from 19:00 p.m. at the Los Angeles University of California, where telescopes will be set up at the UCLA Math Sciences Building Rooftop (9th Floor), and at Lowell Observatory in Flagstaff, Arizona.

Next year's "International Observe The Moon Night "event will happen on October 5, 2019.

Wishing you clear skies and wide eyes

If you enjoyed this article, you might also like:

What Einstein Wrong? Tomorrow Begins A Seven-Year Quest For Mercury To Refine Spacetime

This Weekend The Trillion Star Andromeda Galaxy Will Be Brilliant Best

Missed The Perseids? Here's How To See The Next Great Meteor Shower Of 2018

Here's How To See All Eight Planets In One Night This Week

Follow me on Twitter @jamieacarter @TheNextEclipse or read my other Forbes articles via my profile page.


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