Climate change is already causing all sorts of problems on Earth, but soon it will be making a mess in orbit around the planet too, a new study finds.
MIT researchers calculated that as global warming caused by burning of coal, oil, gas continues it may reduce the available space for satellites in low Earth orbit by anywhere from one-third to 82 percent by the end of the century, depending on how much carbon pollution is spewed. That’s because space will become more littered with debris as climate change lessens nature’s way of cleaning it up.
Part of the greenhouse effect that warms the air near Earth’s surface also cools the upper parts of the atmosphere where space starts and satellites zip around in low orbit, That cooling also makes the upper atmosphere less dense, which reduces the drag on the millions of pieces of human-made debris and satellites.
Photo: AP
That drag pulls space junk down to Earth, burning up on the way. But a cooler and less dense upper atmosphere means less space cleaning itself. That means that space gets more crowded, according to a study in Monday’s journal Nature Sustainability.
“We rely on the atmosphere to clean up our debris. There’s no other way to remove debris,” said study lead author Will Parker, an astrodynamics researcher at MIT. “It’s trash. It’s garbage. And there are millions of pieces of it.”
Circling Earth are millions of pieces of debris about 3 millimeters and larger — the width of two stacked pennies — and those collide with the energy of a bullet. There are tens of thousands of plum-sized pieces of space junk that hit with the power of a crashing bus, according to The Aerospace Corporation, which monitors orbital debris. That junk includes results of old space crashes and parts of rockets with most of it too small to be tracked.
Photo: Reuters
There are 11,905 satellites circling Earth — 7,356 in low orbit — according to the tracking website Orbiting Now. Satellites are critical for communications, navigation, weather forecasting and monitoring environmental and national security issues.
“There used to be this mantra that space is big. And so we can we can sort of not necessarily be good stewards of the environment because the environment is basically unlimited,” Parker said.
But a 2009 crash of two satellites created thousands of pieces of space junk. Also NASA measurements are showing measurable the reduction of drag, so scientists now realize that “the climate change component is really important,” Parker said.
The density at 400 kilometers above Earth is decreasing by about 2 percent a decade and is likely to get intensify as society pumps more greenhouse gas into the atmosphere, said Ingrid Cnossen, a space weather scientist at the British Antarctic Survey who was not part of the research.
Cnossen said in an e-mail that the new study makes “perfect sense” and is why scientists have to be aware of climate change’s orbital effects “so that appropriate measures can be taken to ensure its long-term sustainability.”
Most heroes are remembered for the battles they fought. Taiwan’s Black Bat Squadron is remembered for flying into Chinese airspace 838 times between 1953 and 1967, and for the 148 men whose sacrifice bought the intelligence that kept Taiwan secure. Two-thirds of the squadron died carrying out missions most people wouldn’t learn about for another 40 years. The squadron lost 15 aircraft and 148 crew members over those 14 years, making it the deadliest unit in Taiwan’s military history by casualty rate. They flew at night, often at low altitudes, straight into some of the most heavily defended airspace in Asia.
Beijing’s ironic, abusive tantrums aimed at Japan since Japanese Prime Minister Sanae Takaichi publicly stated that a Taiwan contingency would be an existential crisis for Japan, have revealed for all the world to see that the People’s Republic of China (PRC) lusts after Okinawa. We all owe Takaichi a debt of thanks for getting the PRC to make that public. The PRC and its netizens, taking their cue from the Chinese Communist Party (CCP), are presenting Okinawa by mirroring the claims about Taiwan. Official PRC propaganda organs began to wax lyrical about Okinawa’s “unsettled status” beginning last month. A Global
Taiwan’s democracy is at risk. Be very alarmed. This is not a drill. The current constitutional crisis progressed slowly, then suddenly. Political tensions, partisan hostility and emotions are all running high right when cool heads and calm negotiation are most needed. Oxford defines brinkmanship as: “The art or practice of pursuing a dangerous policy to the limits of safety before stopping, especially in politics.” It says the term comes from a quote from a 1956 Cold War interview with then-American Secretary of State John Foster Dulles, when he said: ‘The ability to get to the verge without getting into the war is
Like much in the world today, theater has experienced major disruptions over the six years since COVID-19. The pandemic, the war in Ukraine and social media have created a new normal of geopolitical and information uncertainty, and the performing arts are not immune to these effects. “Ten years ago people wanted to come to the theater to engage with important issues, but now the Internet allows them to engage with those issues powerfully and immediately,” said Faith Tan, programming director of the Esplanade in Singapore, speaking last week in Japan. “One reaction to unpredictability has been a renewed emphasis on
RSS