The Starlink project could destroy the ozone layer ... (among others)

General scientific debates. Presentations of new technologies (not directly related to renewable energies or biofuels or other themes developed in other sub-sectors) forums).
User avatar
Christophe
Moderator
Moderator
posts: 60567
Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 2685

The Starlink project could destroy the ozone layer ... (among others)




by Christophe » 02/07/21, 15:25

To be taken with a grain of salt ... because the source is Futura Science and Céline Deluzarche (the crazy "journalist" of FS ... : Mrgreen: )

Is Elon Musk going to kill us all? The title would be touting, and yet ... Humans are very good at denying their ability to destroy the planet. A study published in Scientific Reports estimates that the 12.000 Starlink satellites will cause the dispersion of 2 tons of materials in the upper atmosphere each day, mainly aluminum.

Aaron Boley, associate professor of astronomy and astrophysics at the University of British Columbia, is particularly concerned. For good reason, this is an open-air experiment, without any control, carried out by a private company with a capitalist goal, all to confirm the technocratic dreams of a rich man who is a little megalomaniac. Moreover, "the emissions generated by the launch of 1.000 suborbital rockets per year could reduce the density of ozone in high latitudes by 5 to 6%" warns the researcher. Two planetary problems for the price of one.

In just two years, the number of active and dead satellites in the lower atmosphere has increased by more than 50%, to reach around 5.000 units in 2021. SpaceX alone will add 11.000 more and has already applied for an application. authorization for ... 30.000 new launches. 30.000! All this for what ? Have high speed internet in the depths of the Amazon or on your private Yacht? What interest if there is ultimately no planet to live in?

But Elon Musk is seen as a true untouchable, a misunderstood hero of modern times ...




https://www.futura-sciences.com/science ... one-92167/

Uh 2 tonnes every day on 12 satellites is 000 gr per day per unit, or 170 kg per year ... that seems huge to me ... they found Musk's satellites or what?
0 x

User avatar
GuyGadeboisTheBack
Econologue expert
Econologue expert
posts: 4899
Registration: 10/12/20, 20:52
Location: 04
x 1165

Re: The Starlink project could destroy the ozone layer ... (among others)




by GuyGadeboisTheBack » 02/07/21, 15:40

And here we are. Fundamentalist environmentalists are still protesting against the progress of humanity by promising us disaster, debacle and that humanity will rush into a kind of completely fantasized end of the world. <<< in the "manner of". : Mrgreen:
0 x
"It is better to mobilize your intelligence on bullshit than to mobilize your bullshit on smart things. The most serious disease of the brain is to think." (J. Rouxel)
"No ?" ©
"By definition the cause is the product of the effect" .... "There is absolutely nothing to do about the climate" .... "Nature is shit". (Exnihiloest, aka Blédina)
User avatar
Obamot
Econologue expert
Econologue expert
posts: 17294
Registration: 22/08/09, 22:38
Location: regio genevesis
x 1510

Re: The Starlink project could destroy the ozone layer ... (among others)




by Obamot » 03/07/21, 09:26

What is “Elon Musk”? Celine's new perfume? : Cheesy:
0 x
Club of “funny" ABC2019, Izentrop, Sicetaitsimple, Pedrodelavega.
dede2002
Grand Econologue
Grand Econologue
posts: 1016
Registration: 10/10/13, 16:30
Location: Geneva countryside
x 144

Re: The Starlink project could destroy the ozone layer ... (among others)




by dede2002 » 04/07/21, 13:57

Christophe wrote:
Uh 2 tonnes every day on 12 satellites is 000 gr per day per unit, or 170 kg per year ... that seems huge to me ... they found Musk's satellites or what?


There are also rocket engines, and who knows how long those tens of thousands of satellites last?
Maybe it's disposable satellites ...?
0 x
User avatar
izentrop
Econologue expert
Econologue expert
posts: 8108
Registration: 17/03/14, 23:42
Location: picardie
x 651
Contact :

Re: The Starlink project could destroy the ozone layer ... (among others)




by izentrop » 04/07/21, 15:12

dede2002 wrote:
Christophe wrote:Uh 2 tonnes every day on 12 satellites is 000 gr per day per unit, or 170 kg per year ... that seems huge to me ... they found Musk's satellites or what?
There are also rocket engines, and ...
Maybe it's disposable satellites ...?
It's in the study
The disappearance of satellite components when re-entering the aircraft poses a different problem, as none of these elements actually disappear. Starlink satellites have a dry mass of approximately 260 kg; 12 satellites will total 000 tonnes. A 3100-year cycle would see an average of nearly 5 tonnes re-infiltrate into the Earth's atmosphere per day. Although small compared to the 2 tonnes of meteoroid mass per day54, the satellites are mainly made of aluminum; most meteoroids, on the other hand, contain less than 24% Al by mass1. Thus, depending on the residence time in the atmosphere of materials from re-entered satellites, each mega-constellation will produce fine particles that could greatly exceed the natural forms of atmospheric deposition of aluminum at high altitude, especially if the total number planned satellites is launched. Anthropogenic deposition of aluminum in the atmosphere has long been proposed in the context of geoengineering as a means of modifying the terrestrial albedo25. These proposals have been scientifically controversial and the controlled experiments have met with substantial opposition26. The mega-constellations will begin this process as an uncontrolled experience27.
who knows how long these tens of thousands of satellites last?
It all depends on the altitude at the start
Starlink contributions are given based on FCC filed and approved altitudes (335,9, 340,8, 345,6, 550, 1110, 1130, 1275 and 1325 km) and corresponding numbers (2493, 2478, 2547, 1584, 1600, 400, 375, 450). The OneWeb constellation is believed to be made up of 6372 satellites 1200 km away (as filed). It should be recognized that this is an ongoing process and that further changes to orbits and satellite numbers may be filed. As noted in the main text, SpaceX has already deposited 30 additional satellites. It also seeks to lower the 000 km of shells to the region of 1000 to 500 km600. https://www.nature.com/articles/s41598-021-89909-7
a few years at 600 km.
a century at 800 km (this is the orbit of remote sensing satellites, like the Spot family).
several centuries at 1 km (these are the orbits of constellations of telecommunications satellites, such as Globalstar and Iridium). https://fr.wikipedia.org/wiki/Satellite ... A9e_de_vie
1 x
"Details make perfection and perfection is not a detail" Leonardo da Vinci


 


  • Similar topics
    Replies
    views
    Last message

Back to "Science and Technology"

Who is online ?

Users browsing this forum : No registered users and 15 guests