@kim_harding "Are satellites bad for the environment?"
Tthe article is right regarding light pollution and carbon cost of ascent, but fails to note Kessler Syndrome / Collisional Cascading, and doesn't say the minimum re-entry pollution.
Satellite re-entry pollution is more impactful than the mass alone would suggest because of (catalytic?) effects of metals in different atmospheric strata where otherwise there's very little of those elements.
"Measurements show that about 10% of the aerosol particles in the stratosphere contain aluminum and other metals that originated from the “burn-up” of satellites and rocket stages during reentry. [...] These measurements have broad implications for the stratosphere and higher altitudes.
The mass of lithium, aluminum, copper, and lead from the reentry of spacecraft was found to exceed the cosmic dust influx of those metals" [1]
[1] https://www.pnas.org/doi/10.1073/pnas.2313374120
Also excellent: https://earthsky.org/earth/space-vehicle-re-entries-shed-exotic-metal-particles-in-earths-atmosphere/
re: https://pirg.org/edfund/articles/are-satellites-bad-for-the-environment/
Active #satellites must perform an increasing
number of #collision avoidance manoeuvres to dodge out of the way of other satellites and fragments of #SpaceDebris. Another factor is the high level of solar
activity which can often cause increased atmospheric drag. If we extrapolate current trends into the future, catastrophic collision
numbers could rise
significantly https://www.esa.int/Space_Safety/Space_Debris/ESA_Space_Environment_Report_2024
The US is more reliant on satellite technology for war than any other country. Not only will this make it difficult, if not impossible, to launch anything for generations, it will interfere with our military's use of satellite communications with a layer of reflective trash encircling the planet.
Not counting property damage and dead people on the ground from launch debris crashing back to earth across the globe.
Not counting the same from larger pieces of space trash de-orbiting when the breakup begins.
Read this. Elon Musk is actively destroying our country with the blessing of the Russian-controlled Republican party and its gangster god.
Democrats are playing gotcha games with actual, living and breathing, domestic enemies of the Constitution.
There are no patriots in uniform with bars on their chests in this corporation of would-be slave owners masquerading as a country. But there sure are a lot of angry people with guns. The enraged voters I saw in videos of town hall meetings displayed more courage to speak truth to power than any general or admiral with the ability to stop this in an instant has once displayed in this crisis.
Pick the goddamned instant and make it snappy, or there won't be allies left to help. There will be fascists barking orders dictated by the Kremlin, as relayed through its American stooges.
Source: Big Think - September 28, 2023
From the article: "As of today in 2023, however, there are nearly 9000 active satellites, with active Starlinks making up the overwhelming majority of them: 4755 out of the 8647 active satellites, or 55% of them. While media coverage has largely focused on only one detrimental effect so far — the damage that these satellites have already caused and are still causing to astronomy — there’s a second consequence that could be even more disastrous over the long-term: Kessler syndrome. With tens or even hundreds of thousands of satellites in orbit, a single collision could trigger a chain reaction. With the realities of solar flares, coronal mass ejections, and other forms of space weather, the era of mega-constellations may usher in a new type of natural disaster, making Earth’s orbit impassable to all future space-based missions."
#Starlink #KesslerSyndrome #Satellites #Astronomy #SpaceExploration
https://bigthink.com/starts-with-a-bang/musk-starlink-satellites-kessler-syndrome/
"'It's a very difficult problem to communicate to the general public. It's not like an oil spill, where the pelicans are dying. It's not visceral. There's debris you can show them through a telescope. But it's just a dot.'"
Another interesting summary on the Kessler syndrome and how close we may be getting to a very unfortunate event. This has been widely discussed on this and other social media sites. But everyone should know that the Kessler syndrome is real and dangerous.
#kessler #kesslersyndrome #LEO #spacejunk
Kessler Syndrome Unfolding? Ea...
When Space Junk Falls: The Perils of Our Orbital Waste
On December 30, 2024, a Kenyan village was startled by a glowing ring plummeting from the sky, revealing the alarming reality of space debris. As commercial space launches surge, the risks associated ...
https://news.lavx.hu/article/when-space-junk-falls-the-perils-of-our-orbital-waste
@bloui Cet article est du China bashing, c'est SpaceX qui sera probablement responsable du #kesslerSyndrome. https://www.scientificamerican.com/article/spacex-dropped-space-junk-on-my-neighbors-farm-heres-what-happened-next/ Édito écrit par la fédinaute canadienne @sundogplanets
What Is Kessler Syndrome And Why It Has Scientists Worried For Future Of Space https://www.byteseu.com/605117/ #KesslerSyndrome #News #Science #Space #SpaceDebris #SpaceDebrisDisposal
Scenario where space debris collisions create more debris, potentially making space activities and satellite operations unsustainable. Growing risk due to increased space traffic and need for better debris management
#kesslersyndrome #space #satellites #orbit #risk #safety #technology #spacetravel
T-Minus: Kessler Syndrome
LADbible: 'Imminent danger' of #Satellite #Kesslersyndrome that would leave Earth without Wi-Fi, #TV and working phones - Science
https://www.ladbible.com/news/science/kessler-syndrome-earth-space-debris-junk-846003-20241227
Space Station keeps dodging debris from China’s 2007 weapon test
—The Washington Post
"The high-altitude explosion created an estimated 3,500 pieces of debris, according to records maintained by the U.S. Space Force; most of them are still in orbit. They get slightly closer to the atmosphere with each pass, but an analysis shortly after the event predicted it would take more than 100 years for the debris to hit the atmosphere and largely burn up"
https://www.washingtonpost.com/technology/2024/12/23/iss-space-junk-satellite-china-us/