#runthenumbers — Public Fediverse posts

The Big Ten Championship Game will be Ohio State vs. Indiana, as was first reported two weeks ago, by me, on the @[email protected]. #RunTheNumbers

The Big Ten Championship Game will be Ohio State vs. Indiana, as was first reported two weeks ago, by me, on the @[email protected]. #RunTheNumbers

@Brad_Rosenheim

Except ... when this claim (not about the satellites re-entering, just the amount of damage they cause to the atmosphere) started circulating some months back, I read an article (somewhere...) that analyzed the amount and type of matter it would distribute, and it pales in comparison to the amount the earth receives in "space dust" and micrometeroids every day.

Best figure I know of for the mass of "normal" space matter hitting our planet is 5,200 tonnes / year:
https://www.scientificamerican.com/article/antarctic-study-shows-how-much-space-dust-hits-earth-every-year/

The current Starlink satellites are "gen2 mini", and are 740 kg. So you would need to de-orbit more than 7,000 of them every year - not 4 per day - to even match the natural space dust falling on earth. Except it's even worse (for the argument) than that, because 740kg is their launch mass, including all their maneuvering fuel/gasses, which by definition are gone before the satellites are deorbited. I don't have an exact figure for how much mass the fuel accounts for, but it wouldn't surprise me if it was more than 25% of the mass of the spacecraft at launch.

The residue left in the atmosphere doesn't seem to be a very big deal.

#science #mass #satellite #deorbit #RunTheNumbers #calculation

edit: typo

@Brad_Rosenheim

Except ... when this claim (not about the satellites re-entering, just the amount of damage they cause to the atmosphere) started circulating some months back, I read an article (somewhere...) that analyzed the amount and type of matter it would distribute, and it pales in comparison to the amount the earth receives in "space dust" and micrometeroids every day.

Best figure I know of for the mass of "normal" space matter hitting our planet is 5,200 tonnes / year:
https://www.scientificamerican.com/article/antarctic-study-shows-how-much-space-dust-hits-earth-every-year/

The current Starlink satellites are "gen2 mini", and are 740 kg. So you would need to de-orbit more than 7,000 of them every year - not 4 per day - to even match the natural space dust falling on earth. Except it's even worse (for the argument) than that, because 740kg is their launch mass, including all their maneuvering fuel/gasses, which by definition are gone before the satellites are deorbited. I don't have an exact figure for how much mass the fuel accounts for, but it wouldn't surprise me if it was more than 25% of the mass of the spacecraft at launch.

The residue left in the atmosphere doesn't seem to be a very big deal.

#science #mass #satellite #deorbit #RunTheNumbers #calculation

edit: typo

@Brad_Rosenheim

Except ... when this claim (not about the satellites re-entering, just the amount of damage they cause to the atmosphere) started circulating some months back, I read an article (somewhere...) that analyzed the amount and type of matter it would distribute, and it pales in comparison to the amount the earth receives in "space dust" and micrometeroids every day.

Best figure I know of for the mass of "normal" space matter hitting our planet is 5,200 tonnes / year:
https://www.scientificamerican.com/article/antarctic-study-shows-how-much-space-dust-hits-earth-every-year/

The current Starlink satellites are "gen2 mini", and are 740 kg. So you would need to de-orbit more than 7,000 of them every year - not 4 per day - to even match the natural space dust falling on earth. Except it's even worse (for the argument) than that, because 740kg is their launch mass, including all their maneuvering fuel/gasses, which by definition are gone before the satellites are deorbited. I don't have an exact figure for how much mass the fuel accounts for, but it wouldn't surprise me if it was more than 25% of the mass of the spacecraft at launch.

The residue left in the atmosphere doesn't seem to be a very big deal.

#science #mass #satellite #deorbit #RunTheNumbers #calculation

edit: typo

@Brad_Rosenheim

Except ... when this claim (not about the satellites re-entering, just the amount of damage they cause to the atmosphere) started circulating some months back, I read an article (somewhere...) that analyzed the amount and type of matter it would distribute, and it pales in comparison to the amount the earth receives in "space dust" and micrometeroids every day.

Best figure I know of for the mass of "normal" space matter hitting our planet is 5,200 tonnes / year:
https://www.scientificamerican.com/article/antarctic-study-shows-how-much-space-dust-hits-earth-every-year/

The current Starlink satellites are "gen2 mini", and are 740 kg. So you would need to de-orbit more than 7,000 of them every year - not 4 per day - to even match the natural space dust falling on earth. Except it's even worse (for the argument) than that, because 740kg is their launch mass, including all their maneuvering fuel/gasses, which by definition are gone before the satellites are deorbited. I don't have an exact figure for how much mass the fuel accounts for, but it wouldn't surprise me if it was more than 25% of the mass of the spacecraft at launch.

The residue left in the atmosphere doesn't seem to be a very big deal.

#science #mass #satellite #deorbit #RunTheNumbers #calculation

edit: typo

@Brad_Rosenheim

Except ... when this claim (not about the satellites re-entering, just the amount of damage they cause to the atmosphere) started circulating some months back, I read an article (somewhere...) that analyzed the amount and type of matter it would distribute, and it pales in comparison to the amount the earth receives in "space dust" and micrometeroids every day.

Best figure I know of for the mass of "normal" space matter hitting our planet is 5,200 tonnes / year:
https://www.scientificamerican.com/article/antarctic-study-shows-how-much-space-dust-hits-earth-every-year/

The current Starlink satellites are "gen2 mini", and are 740 kg. So you would need to de-orbit more than 7,000 of them every year - not 4 per day - to even match the natural space dust falling on earth. Except it's even worse (for the argument) than that, because 740kg is their launch mass, including all their maneuvering fuel/gasses, which by definition are gone before the satellites are deorbited. I don't have an exact figure for how much mass the fuel accounts for, but it wouldn't surprise me if it was more than 25% of the mass of the spacecraft at launch.

The residue left in the atmosphere doesn't seem to be a very big deal.

#science #mass #satellite #deorbit #RunTheNumbers #calculation

edit: typo

La escasez de #Bitcoin es algo de lo que se debería analizar y escribir más

Con una facilidad increíble podemos #RuntheNumbers y conocer al momento la emisión de btc

#Bitcoin es maravilloso porque no deja nada fuera del control de las matemáticas

Interesante ejercicio de Raúl
👇🤔🤔🤔🤔👇
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RT @raul_6102
The scarcity of #Bitcoin is tougher than you might think.

When Bitcoin is adopted globally, its scarcity will hit harder and faster than our minds can comprehend.

In this little weekend project I estimated how many people can own a full BTC? And 10? And 21?

I #RunTheNumbers🧵
https://twitter.com/raul_6102/status/1545855216444227586

Así las cosas por España, ya verán el siguiente reporte, pasaremos del 10%, al 7% o al 6%
Lo que sea que eso signifique

Las cifras reales te las da el del pescado cuando le compras, o la frutería

Ese es el verdadero número de la inflación
#runthenumbers 😂😬
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RT @danfmsg
La inflación oficial en España ya supera el 10%.

Pero hay buenas noticias. El gobierno de España está haciendo todo lo posible por reducir esta cifra: ha cesado al dir…
https://twitter.com/danfmsg/status/1542373181272608771

If you have #zeroBaseFee and 100 ppm feerate still routing 9999 sat payments for free.
Where you would count on 100ppm your node charges nothing for 100*9999.
With 1 sat basefee you would get exactly 100 sats both when routing 1*999900 or 100*9999.
#runTheNumbers #lightning ⚡
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RT @alexbosworth
LN routing policy rounds down percentage fees and the lowest ppm is 1, so sometimes you can get totally free routing just by using multi-pat…
https://twitter.com/alexbosworth/status/1415774383298121731