*Secret hilarious project* is now live!

Astronomy has a fine tradition of April Fool's Day papers, where there are real calculations, but perhaps on a very silly topic.

Compilation of this year's Acta Prima Aprilia papers here: https://www.actaprimaaprilia.com/2026-issue

Acta Prima Aprilia - 2026 Issue

Plan 9: Detecting Atmospheric Deterrence Against Interstellar Monsters David Rice, Michael J. Radke arXiv:2603.28895 Exoplanet atmospheres are usually discussed as tracers of climate, chemistry, and habitability, but they may also preserve signatures of planetary defense. We consider three

Along with @astrokiwi.bsky.social and Laura Revell, we wrote "Cow-culation: Reentry Impact Risk to Livestock in the Satellite Megaconstellation Era" https://arxiv.org/pdf/2603.29324

This all started because the three of us were writing about pollution from satellites and bemoaning the fact that there is basically no funding for this serious, rapidly growing issue. But you know what does get a lot of funding in NZ? Cows! And the joke began...

"Using a global bovine density dataset, previously published satellite casualty probability code, and a complete lack of funding to do this calculation carefully enough for submission to a peer-reviewed journal, we calculate a ≃ 0.3–1% chance of a cow-sualty in NZ from reentering Starlink Gen2 debris over the next 5 years."

This is NOT peer-reviewed, though we wish it was! Maybe this silly cow-culation will be enough to get some government agency to fund us to do this better!

This is the highest footnote count and highest pun density of anything I've ever written. And it was WAY more fun than writing a research paper or a scicomm article!

Please enjoy reading, laugh at our puns, and then talk to your government representatives about better regulation of satellites in orbit, and accountability for their pollution!

It'll take me several days to actually get home, but I'm about to start the first leg of the #ProfSamLectureTour return trip.

I'd like to point out that while I was here, the 3 of us friends who wrote the cow-culation paper also wrote a scicomm article https://theconversation.com/a-new-space-race-could-turn-our-atmosphere-into-a-crematorium-for-satellites-276366 and an obituary. (While I also travelled around and gave talks about satellite pollution and helped with teaching).

What a year these last 6 weeks have been! Thanks for all the flat whites, Christchurch!

A new space race could turn our atmosphere into a ‘crematorium for satellites’

Planned ‘megaconstellations’ of satellites could cause unforeseen harm to the ozone layer and climate systems. Global regulation is needed before it’s too late.

The Conversation
Current status: trying to stuff my weight in Merino sweaters and yarn into my luggage
@sundogplanets
Can you mail some home instead?

@sundogplanets

Wear them & put them on the kids & hubs...it's always cold on the plane 🤣

@sundogplanets
Leave behind everything else, except a change of underwear.
@USelaine I did seriously consider that option...
@sundogplanets Vacuum packing bags are amazing.
@ghewgill @sundogplanets my sister used those and the results are uncanny
@sundogplanets New Zealand Merino is the best!
@sundogplanets You can always buy another piece of luggage. Good yarn is hard to come by in Saskatchewan. I would know :(
@sundogplanets
Safe travels, and good luck with the yarn stuffing. Nice yarn (and sweaters made of nice yarn!) is such a luxurious thing.
@sundogplanets Travel hack: It could be cheaper to send some by mail and declare at customs as non-accompanying luggage.
@sundogplanets Safe, easy, and smooth travels.
@sundogplanets Safe journeys home. Looking forward to seeing your farm animal friends photos again soon 🙂