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Grrl Power #1378 - Commence Operation StealthySpaceGambleBloodSport

🕑 Added 2025-07-31 10:00:11 +0000 UTC
Grrl Power #1378 - Commence Operation StealthySpaceGambleBloodSport

Comments

Mark Magagna

Stealth in space? Yes, changing velocity without an energetic exhaust is very difficult. I think that generalizes to stealth in space coming down to hiding your waste heat. Anything not perfectly efficient that does work generates waste heat, which makes you stand out from the very cold (3 degrees Kelvin) background. Infrared sensors are pretty easy to make since we've made military versions since at least the end of WW2, and science lab versions before that. This does depend on access to space - ground-based infrared sensors have to peer through a much hotter and turbulent atmosphere, making them much less useful. You hide your waste heat by attempting to direct it or by being in front of something hotter than 3 Kelvin. Directing it means knowing which direction the sensor is, and it doesn't work long term. Standing in front of hotter objects has the problem (at least at our tech level) that everything is falling if it isn't thrusting, so that's also short term. Most hotter objects also are known patterns, so you have to match that emission pattern. The cheapest method now for detecting moving objects in space is taking time-lapse photos (in whatever spectrum) and noticing which dots move against the known, i.e. "stationary" background pattern. Tracking things like meteors is more difficult because they're at background temperature, so you must rely on reflected radiation. In the comic, people have visited from space in the past. But I doubt they do it undetected much these days.

Mark Magagna

Vinyl underwear? I have it on very good authority (lots of old SF magazine covers) that not much underwear is worn in space. What we would call underwear is outer wear. Those magazine covers wouldn't show things that don't exist, right?


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