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Prompted by a now deleted question about practicalities of operating a SpaceX Starship from unprepared terrain on the moon I found this 2022 solicitation for studies around 'Lunar Surface Site Prepara …

Not meeting the criteria of the question but there is day probe from Pioneer which was not intended to survive but continued to operate for 45 minutes after impact. A number of other probes have lost …

While more outer planet missions have not 'failed' it is worth noting that many of them have had major problems. Juno was not able to reach target orbit, Galileo had antenna and other issues, Genesis …

Clip on thruster units already exist, at least for geostationary orbit. The Mission Extension vehicle has flown twice, most recently in 2020. It operates by mechanically coupling to a suitable engine …

The easy answer for replacing the crew of the ISS is that your process will 'pass' about as many as there are current Astronauts simple because you do not need that many and will just add filters unti …

Per NASA press release the contract for the unpressurized rover is for a vehicle plus delivery to the moon via separate landing system, at which point it will operate under remote control until needed …

More fundamental, and a question if it counts as a 'space agency' act being NOAA led but weather satellites not only reduced the fatalities associated with weather data collection but increased the nu …

No Space Shuttle questions are simple, since it was a long program with many different drives beyond engineering perfection*, so the short answer is 'yes, given money, time and perfect management/dire …

Leaving aside the very valid political elements of the Orion design choices. As noted in the question, many costs/weights in manned space flight are fixed per craft regardless of crew size. A computer …

All manned Mars proposals that do not involve a nuclear launch from earth have a LOT of launches. Pretty much every serious plan since Von Braun's have involved multiple launches assembled in earth or …

One reason for not starting a new one is that we have already built several: Flashline Arctic Devon Island Utah Dessert Sealed 500 day missions Hawaii Underwater And the actual antarctic stations, one …

Pulling some numbers from project Rho which appear to be quoting the original studies, we get 16M Newton from a 5 kt device onto a 20 meter pusher plate. This assumes optimal plate design that a rando …

There are several overlapping issues that complicate the siting of a launch site In Bangladesh. Achieving Geostationary or other equatorial orbits requires clear trajectory to the East, which is not b …