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#leo

25 postitusega4 osalejaga0 postitust täna
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#Falcon1 failed three times before tasting success. #Spectrum is somewhat larger and more capable than Falcon 1, with performance in line with #Firefly's Alpha rocket.

The fully assembled Spectrum rocket stands about 28 meters 📏 tall and measures more than 2 meters in diameter. The expendable launcher is designed to haul payloads up to 1 metric ton (2,200 pounds) into #LEO arstechnica.com/space/2025/03/

Ars Technica · This launcher is about to displace the V-2 as Germany’s largest rocketStephen Clark poolt
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If you're a woman living in Dublin and either a sole trader, running a business, or vaguely considering doing so, LEO WIB group is amazing, and hands down the best fifty quid I spend each year.

You get aforementioned Weekly Coffee Zoom, a monthly in-person event, and twice a year they really push the boat out for Summmer Event and the Christmas Party.

localenterprise.ie/DublinCity/

www.localenterprise.ieLocal Enterprise Office Dublin City Women in Business Network - Local Enterprise Office - DublinCity

I'm a member of the Dublin Local Enterprise Office group for Women in Business and we do weekly Zoom meetings. Sometimes it's just a coffee meetup, sometimes it's a talk from a member who shares their expertise on a niche subject.

Today that expert was me! 🎉

My expert talk was a very condensed primer on FOSS and The Fediverse where I only uhm a million times. @mastodonie gets mentioned a bit 😉

For a limited time only you can watch it here!

@Brad_Rosenheim @sundogplanets

I do not like #ElonMusk and I believe that #Starlink's usefulness is totally outweighed by the many impacts it has on limited global resources like space in the #LEO.

However, it is currently not clear whether the current levels of aluminum oxides from reentering satellites could pose a threat to the ozone layer. Even though the amount of Al in stratospheric aerosols (of which we have only limited samples) has been increasing, the total mass of anthropogenic Al oxides is still orders of magnitude smaller than the natural injection of metal oxides from meteorites - which itself is small compared to stratospheric aerosol injection from volcanoes.

Also, it is quite likely that most of the anthropogenic Al in the stratosphere is actually emitted from solid rocket motors (SRM) and not satellites upon reentry.

There was a paper in #GRL last year that tried to sum up what we know. As an atmospheric scientist, I do not agree with all their conclusions but it is still worth reading.

doi.org/10.1029/2024GL109280