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Joined 1 year ago
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Cake day: June 10th, 2023

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  • The solar sail reflects light instead of absorbing it so you get to double dip on photon momentum.

    And sure, you can steer with the laser I suppose, but with that kind of super weak deltaV, you’re not going to be exactly doing donuts in the solar system.

    Even the massive solar sail only imparts a super small amount of force. It’s only useful because it does so for free over a long period of time with no air resistance.

    You’d be better off using a conventional thruster to do whatever steering you needed to do before letting the sail take over. It’s not like you need to steer around any obstacles.



  • I ditched my smartphone spring of 2023. Still use it on WiFi at home, but every time I leave the house, I only carry a fliphone.

    Every time a stranger asks me about it, they say something like “I wish I could ditch my smartphone.” Like I get it. It’s not easy. I can’t even go to a baseball game unless my wife has our tickets on her phone. Paying for parking sometimes requires an app.

    Yet apparently everyone hates this thing that they are now required to carry around.

    How did we get here?

















  • I bought a Canon T2i in 2010. 19MP, APS-C sensor. Had it fitted with a $1200 17-55 F/2.8 IS lens. Used to bring it to family Christmas every year for the group photo until around 2016. My cousin handed me her phone to get the family on it as well.

    Between improvements in sensor technology, whatever post processing was happening at the time, and the lenses on the iPhone, it blew my camera away.

    It’s actually pretty hard to find a midrange camera now because phones are so good. I switched to a dumb phone last year. Best pocketable camera I could find to complement it that wasn’t a toy was the Ricoh GRIII which came out in 2019. Got a 4K camcorder. Best I could do was a Sony AX700 from 2018.