/sci/ - Science & Math

>>14745326
https://en.wikipedia.org/wiki/Advanced_Cryogenic_Evolved_Stage
>IVF was designed by ULA to be optimal for depot operations, since only liquid hydrogen and liquid oxygen would need be transferred, and it could, if built, conceivably extend mission lifetimes from the present dozens of hours to multiple days.
ok but how *many* days? weeks? months?

>>14556372
>You report the “first time” that cosmic dust has been found in urban dirt (17/24/31 December 2016, p 12). Iron micrometeorites are in fact very common and easy to find wherever rain is frequent and guttering to catch it is fitted to buildings
>Iron space dust that is fine enough to escape incineration as “shooting stars” when entering Earth's atmosphere drifts down continuously. To collect these small iron spheres, scrape several handfuls of mud from a convenient roof gutter, preferably a plastic one, add to a bucket of water and stir.
>Fish for meteorites with a strong magnet wrapped in a plastic bag. Remove the magnet, carefully rinse the bag into a glass dish and look for fine, dark grey dust. Dragging the magnet underneath will concentrate the dust. A good magnifier will show tiny spheres, some of them up to 0.2 millimetres in diameter.
https://www.newscientist.com/letter/mg23331090-800-10-finding-meteorites-in-your-gutters-is-easy/