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China to Launch Lunar Lighting in Outer Space

Super Moon over the Parthenon by Anthony Ayiomamitis | NASA
Super Moon over the Parthenon by Anthony Ayiomamitis | NASA
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China to Launch Lunar Lighting in Outer Space

Super Moon over the Parthenon by Anthony Ayiomamitis | NASA
Super Moon over the Parthenon by Anthony Ayiomamitis | NASA

China is planning to launch its own 'artificial moon' by 2020 to replace streetlamps and lower electricity costs in urban areas, state media reported Friday.

According to China Daily, "illumination satellites" will shine in tandem with the real moon over Chengdu, a city in southwestern Sichuan province, but eight times brighter.

The first man-made moon will launch from Xichang Satellite Launch Center in Sichuan, with three more to follow in 2022 if the first test goes well, said Wu Chunfeng, head of Tian Fu New Area Science Society, the organization responsible for the project.

Though the first launch will be experimental, the 2022 satellites "will be the real deal with great civic and commercial potential," he said in an interview with China Daily.

By reflecting light from the sun, the satellites could replace streetlamps in urban areas, saving an estimated 1.2 billion yuan ($170 million) a year in electricity costs for Chengdu, if the man-made moons illuminate an area of 50 square kilometers.

The extraterrestrial source of light could also help rescue efforts in disaster zones during blackouts, he added.

As China's space program races to catch up with that of the United States and Russia, a number of ambitious projects are in the pipeline, including the Chang'e-4 lunar probe -- named after the moon goddess in Chinese mythology -- which aims to launch later this year. If it succeeds, it will be the first rover to explore the "dark side" of the moon.

China is not the first country to try beaming sunlight back to Earth. In the 1990s, Russian scientists reportedly used giant mirrors to reflect light from space in an experimental project called Znamya or Banner.

Chengdu's artificial moon project was announced by Wu at an innovation and entrepreneurship conference in Chengdu on October 10.

In addition to Tian Fu New Area Science Society, other universities and institutes, including the Harbin Institute of Technology and China Aerospace Science and Industry Corp, are involved in developing Chengdu's illumination satellites.

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Eastern Half of US Braces for More Long Days of Dangerous Heat

A kid cools off in Crown Fountain in Millennium Park as temperatures climbed to over 95 degrees Fahrenheit (35 degrees Celsius), in Chicago, Illinois, on June 21, 2025. (Photo by KAMIL KRZACZYNSKI / AFP)
A kid cools off in Crown Fountain in Millennium Park as temperatures climbed to over 95 degrees Fahrenheit (35 degrees Celsius), in Chicago, Illinois, on June 21, 2025. (Photo by KAMIL KRZACZYNSKI / AFP)
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Eastern Half of US Braces for More Long Days of Dangerous Heat

A kid cools off in Crown Fountain in Millennium Park as temperatures climbed to over 95 degrees Fahrenheit (35 degrees Celsius), in Chicago, Illinois, on June 21, 2025. (Photo by KAMIL KRZACZYNSKI / AFP)
A kid cools off in Crown Fountain in Millennium Park as temperatures climbed to over 95 degrees Fahrenheit (35 degrees Celsius), in Chicago, Illinois, on June 21, 2025. (Photo by KAMIL KRZACZYNSKI / AFP)

Tens of millions of people across the Midwest and East braced Sunday for another sweltering day of dangerously hot temperatures as a rare June heat wave continued to grip parts of the US.

Most of the northeastern quadrant of the country from Minnesota to Maine was under some type of heat advisory Sunday. So were parts of Arkansas, Tennessee, Louisiana and Mississippi, The Associated Press reported.

The temperature had already reached 80 degrees Fahrenheit (26.6 degrees Celsius) in the Chicago area by 7:30 a.m. Sunday, according to the National Weather Service. Forecasts called for heat indices of between 100 and 105 degrees F (37.7 to 40.5 degrees C).

The heat index in Pittsburgh was expected to top 105 F. The temperature in Columbus, Ohio, was 77 F (25 C) at 8:30 a.m. Highs there were expected to reach 97 F (36 C) with a heat index around 104 F (40 C).

Forecasts called for a heat index of 100 F in Philadelphia on Sunday, with a 108 F (42.2 C) heat index on Monday.

The city’s public health department declared a heat emergency starting at noon Sunday and ending Wednesday evening. Officials directed residents to air-conditioned libraries, community centers and other locations, and set up a “heat line” staffed by medical professionals to discuss conditions and illnesses made worse by the heat. At Lincoln Financial Field, officials said each fan attending Sunday’s FIFA World Cup match would be allowed to bring in one 20-ounce (0.6-liter) plastic bottle of water.

Sunday marked the second straight day of extreme heat across the Midwest and East Coast. Heat indices on Saturday hit 103 F (39.4 C) in Chicago and 101 F (38.3 C) in Madison, Wisconsin, turning that city's annual naked bike ride into a sticky and sweaty affair.

Minneapolis baked under a heat index of 106 F (41.1 C). The actual temperature was 96 degrees F (35.5 degrees C), which broke the old record for the date of 95 F (35 C) set in 1910, according to the weather service.

The heat is expected to persist into the coming week, with the hottest temperatures shifting eastward. New York City is expected to see highs around 95 F (35 C) on Monday and Tuesday. Boston is on track for highs approaching 100 F (37.7 C) on Tuesday, and temperatures in Washington, D.C., were expected to hit 100 F on Tuesday and Wednesday.

Meteorologists say a phenomenon known as a heat dome, a large area of high pressure in the upper atmosphere that traps heat and humidity, is responsible for the extreme temperatures.

Mark Gehring, a National Weather Service meteorologist in Sullivan, Wisconsin, said this level of heat is not uncommon during the summer months in the US, although it usually takes hold in mid-July or early August. The most unusual facet of this heat wave is the sheer amount of territory sweltering under it, he said.

“It's basically everywhere east of the Rockies,” he said, referring to the Rocky Mountains. “That is unusual, to have this massive area of high dewpoints and heat.”