7 Minutes of Terror: The Challenges of Getting to Mars on HackerTube: recommended by 5 Hacker News commenters across 4 separate months, 2016–2021.
documentary · evergreen
NASA JPL engineers explain the final minutes of the Curiosity rover's entry, descent and landing on Mars, which combined aerobraking, a parachute and a skycrane. It lays out the tight sequence of events that all had to work automatically.
HN repeatedly recommends it as an awe-inspiring example of engineering problem solving and the go-to explainer on how Mars landings work.
“If you have not watched the seven minutes of terror video produced by NASA, you absolutely must.”
9 Hacker News comments link this video. Each one links back to its thread.
If you have not watched the seven minutes of terror video produced by NASA, you absolutely must. It details exactly how they put these amazing machines on the surface of Mars. ▶ this video
in “Mars landing: Photo shows Perseverance rover during landing” · View on HN
Reminds of the "Seven Minutes of Terror" video that NASA put out ahead of the Curiosity landing explaining how they intended to make it safely to the surface. ▶ this video (Note: I get goosebumps every time I watch this, absolutely amazing problem solving.)
in “Mars Reconnaissance Orbiter views Schiaparelli landing site” · View on HN
JPL produced a video titled "7 minutes of terror" that detailed the landing procedure they used for Curiosity, and it's worth a watch. It goes into detail on everything you see in the articles landing video: ▶ this video
in “NASA's Perseverance rover will attempt to land on Mars this week” · View on HN
Curiosity used aerobraking, parachutes AND a skycrane to land. There's a great video here: ▶ this video Previous solutions weren't used because they were less crazy, but because they were more mass efficient for "small" payload sizes.
in “The SpaceX Starship is a big deal” · View on HN
> I still haven't seen any case for visual programming. Aerodef, automotive, etc all use some form of visual programming. Controls engineers rarely write code, the systems are way too complex. E.g. I highly recommend watching this video from JPL to give you an understanding of where such tools excel. It's about simulating, iterating and then having scientists and engineers autogenerate the code they couldn't possibly write or test ▶ this video
in “Visual Programming Doesn’t Suck” · View on HN
For perceiving the events happening, sure, that was my point. These time differences are nearly always imperceptible but at distances of planets it truly becomes a way of looking into the past. But to be clear, events happen concurrently, eg NASA knew _when_ relative to earth time and _perceived_ events, each stage was "happening" local to Mars vs Earth (assuming it all went well). They made videos about this "7 minutes of terror", I forgot the name of them but linking here [0] [0] ▶ this video
in “NASA's Curiosity rover: 3k days on Mars” · View on HN
Yup. The robotic program has a very good track record of successes, even for crazy stuff like the Mars Science Laboratory’s sky crane descent stage: ▶ this video It’s the human spaceflight program that has had the, um, difficulties. There are signs of hope, though.
in “NASA plans to launch a spacecraft to Titan” · View on HN
There's a video showing the JWST deployment sequence. It's set to calm orchestral music, and the visuals are just 3D renters of the spacecraft. [link] This video makes me far more nervous than "7 Minutes of Terror", depicting Curiosity's entry/descent/landing sequence. Far more things have to go right in order for JWST to become operational. ▶ this video
in “Hubble Space Telescope Is In Safe Mode After Gyro Failure” · View on HN
Surprisingly the wheels only weigh a few pounds each! (I still can't think in metric and I don't have a real number.) They were primarily constrained by packing volume during cruise ( [link] ) and then by shock loads as the securing pyrobolts blew during landing ( ▶ this video ).
in “Breaks Observed in Rover Wheel Treads” · View on HN