exploration

- The FCC approved EchoStar’s planned sale(s) of spectrum licenses. - The approval requires $2.4 billion be placed in escrow pending completion/review of the transactions. - The decision clears a key regulatory hurdle for the deal(s) while leaving potential for additional conditions or oversight. Source:

- Suggests a Kessler cascade would likely begin in LEO, which contains many vehicles at varied inclinations. - Notes simulations show rapid secondary-debris spread, and posits higher-inclination fragments may intersect more and spread faster. - Asks how quickly fragments are transported to higher orbits versus being cleared at lower altitudes

- The post asks how quickly debris from a Kessler syndrome cascade in LEO would spread vertically to higher orbits versus remaining in the originating orbital shell. - It notes simulations show rapid lateral spread of debris, especially from large collisions, and suggests higher-inclination fragments might intersect populated near-equatorial orbits

- Questions how a Kessler cascade originating in LEO would spread debris across orbital inclinations and whether higher-inclination orbits accelerate spreading. - Notes simulations showing rapid secondary-collision debris production, especially from large impactors. - Asks how quickly fragments would be carried to higher orbits versus cleared by atmospheric drag at

- The post asks how a Kessler syndrome cascade, likely starting in crowded LEO with varied inclinations, spreads debris. - Simulations show rapid secondary-collision debris dispersal; higher-inclination impacts might intersect more populated near-equatorial traffic. - The author questions how quickly fragments diffuse to higher orbits versus being left on elliptical

- Asks whether transporting Earth’s excess water to Mars is theoretically possible versus practically impossible. - Wonders how much water would need moving to mitigate sea-level rise. - Requests estimates of rockets and fuel required under plausible spacefaring advances. - Asks whether delivered water would remain on Mars or