Hackers' Pub

Hackers’ Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Prof. Sam Lawler @sundogplanets@mastodon.social

7/3/2025, 2:05:10 PM

Public

New SpaceX report on Starlink conjunctions and deorbits (a.k.a. dumping tons of metal/plastic/solar panels/computers into the upper atmosphere) https://www.scribd.com/document/883045105/SpaceX-Gen1-Gen2-Semi-Annual-Report-7-1-25

Scariest part:
472 Starlinks were burned up in the atmosphere in Dec-May. Assuming each satellite is 800kg, and 50% aluminum by mass, that's 1 ton of aluminum PER DAY.

The natural infall rate of aluminum from meteoroids is 0.3 tons per day. Starlink has been ~3x that, for the last 6 months.

SpaceX Gen1-Gen2 Semi-Annual Report (7!1!25)

SpaceX FCC doc

www.scribd.com · Scribd

Prof. Sam Lawler @sundogplanets@mastodon.social

7/3/2025, 2:07:28 PM

Public

Kessler Syndrome update:
They report 144,000 collision avoidance maneuvers across the whole constellation in Dec-May. That's about one maneuver every 2 minutes.

Every 2 minutes there's a chance for a mistake that would lead to a very bad day in orbit. And as this paper shows (with Dr. Kessler himself as a co-author!), a very bad day at that altitude would lead to a runaway collisional cascade. No more satellites at that altitude! https://conference.sdo.esoc.esa.int/proceedings/sdc9/paper/305/SDC9-paper305.pdf

Klaus Minol · Instructions to Authors for the production of Proceedings papers

conference.sdo.esoc.esa.int

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