Tootfinder

SpaceX launching air strikes against Canada:
https://www.cbc.ca/news/canada/saskatchewan/saskatoon-space-debris-satelitte-reentry-1.7643516

Space debris from Starlink re-entry spotted in sky above Saskatoon | CBC News
People in Saskatoon caught a glimpse of something strange in the sky on early Tuesday morning. An astronomy expert says it was a SpaceX Starlink satellite coming back down to Earth.

End-to-end Training of High-Dimensional Optimal Control with Implicit Hamiltonians via Jacobian-Free Backpropagation
Eric Gelphman, Deepanshu Verma, Nicole Tianjiao Yang, Stanley Osher, Samy Wu Fung
https://arxiv.org/abs/2510.00359

End-to-end Training of High-Dimensional Optimal Control with Implicit Hamiltonians via Jacobian-Free Backpropagation
Neural network approaches that parameterize value functions have succeeded in approximating high-dimensional optimal feedback controllers when the Hamiltonian admits explicit formulas. However, many practical problems, such as the space shuttle reentry problem and bicycle dynamics, among others, may involve implicit Hamiltonians that do not admit explicit formulas, limiting the applicability of existing methods. Rather than directly parameterizing controls, which does not leverage the Hamiltoni…

Whatever hit United Airlines UA1093 on 16 October (https://aviationa2z.com/index.php/2025/10/18/united-airlines-737-max-pilot-injured-as-windshield-cracks/ or https://viewfromthewing.com/united-captain-says-his-plane-was-hit-by-space-debris-at-36000-feet-new-photos-show-cockpit-damage) - no space debris reentry fits: https://planet4589.org/space/misc/ua1093.html

"Scientists Warn of Emissions Risks from the Surge in Satellites"
#Satellites #Emissions #Climate #ClimateChange

Scientists Warn of Emissions Risks from the Surge in Satellites
With hundreds of satellites launched each year and tens of thousands more planned, scientists are increasingly concerned about an emerging problem: emissions from the fuels burned in launches and from the pollutants released when satellites and rocket stages flame out on reentry.

Uhoh! That Saskatchewan space lady @… is on the CBC again! :)
#LookUp #CBC #Starlink #spacedebris
https://www.cbc.ca/news/canada/saskatchewan/saskatoon-space-debris-satelitte-reentry-1.7643516

The flight of the 11th #Starship itself also went completely to plan it seems: deploying all dummy 'satellites', relighting an engine and reentry and controlled splashdown in the Indian Ocean despite deliberate damage and hard maneuvers. Full screencaps and four more in https://bsky.app/profile/cosmos4u.bsky.social/post/3m34hq2qcmc2q