Sarah Boessenecker, MSc. 🏛️🔭
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tetrameryx.bsky.social
Sarah Boessenecker, MSc. 🏛️🔭
@tetrameryx.bsky.social
880 followers 490 following 190 posts
Paleontologist, fossil librarian, amateur astronomer, cat mom
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https://www.astrobin.com/users/tetrameryx/
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tetrameryx.bsky.social
Nerd stuff:
12 frames, stacked
Seestar s50
Stacked in Siril, and processed in Pixinsight, with minor edits in Gimp
October 24, 2025 at 7:35 PM
Reposted by Sarah Boessenecker, MSc. 🏛️🔭
coastalpaleo.bsky.social
And finally, my favorite sightings: I got to snorkel with a bunch of sea lion pups in their nursery at La Jolla Cove! I didn't approach them: I basically just floated there and they would do 'flybys' every couple of minutes. This one was playing with a piece of kelp! 🤿🐬🦑 #snorkeling
A sea lion pup swimming by, belly facing me, foreflippers outstretched, and letting out a ton of bubbles from its mouth; the water is a bluish turquoise and the seafloor is covered in bright green seagrass A pair of sea lion pups swimming by me, the one in front has a long piece of kelp that it is biting and pulling along; the water is a bluish turquoise and the seafloor is covered in bright green seagrass A pair of sea lion pups swimming by me, the one in front has a long piece of kelp that it is biting and pulling along; the water is a bluish turquoise and the seafloor is covered in bright green seagrass A pair of sea lion pups swimming by me, the one pulling the piece of kelp has just dropped it and is doing a loop-the-loop; the water is a bluish turquoise and the seafloor is covered in bright green seagrass
October 19, 2025 at 4:08 PM
Reposted by Sarah Boessenecker, MSc. 🏛️🔭
coastalpaleo.bsky.social
A small school of Pacific barracuda (Sphyraena argentea) - a bit smaller than the great barracuda you find in the Caribbean, and with a distinctive yellow tail; my first time seeing this species!
A school of about a dozen Pacific barracuda. They are long, silvery, with some faint barring, and a yellow tail. Kelp can be seen in the distance A school of about a dozen Pacific barracuda. They are long, silvery, with some faint barring, and a yellow tail. Kelp can be seen in the distance A school of about a dozen Pacific barracuda. They are long, silvery, with some faint barring, and a yellow tail. Kelp can be seen in the distance
October 18, 2025 at 4:42 PM
tetrameryx.bsky.social
Nerd stuff:
94 frames, stacked
Seestar s50
Stacked in Siril, and processed in Pixinsight, with minor edits in Gimp
October 19, 2025 at 4:17 PM
tetrameryx.bsky.social
This nebula has over 100 stars in it. It’s bright enough I only got around 15 minutes on it, as I was waiting for another target to rise and thought I’d grab some data on this one. I will likely go back to it at some point!
October 19, 2025 at 4:17 PM
tetrameryx.bsky.social
The Omega Nebula is a bright nebula between 5000-6000 light years from earth, and is 15 light years across! It is in the constellation Sagittarius, and has the mass of 800 suns. It is a stellar nursery - new stars are born here.
October 19, 2025 at 4:17 PM