Jonathan O'Callaghan

Freelance space journalist. British Science Journalist of the Year 2024. Words in The New York Times, Scientific American, New Scientist, BBC, WIRED, + more.

Bangkok, Thailand
jdaoca@gmail.com
@astro_jonny on Twitter
[jonathanocallaghan.com](https://www.jonathanocallaghan.com/ )

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Last Notes

2026-09-03 01:20:14 UTC

- reply

Next, a new model shows Venus could have had a moon for nearly 2 billion years – before the planet ate it.
It might be hard to prove this happened, but it could explain the disappearance of the planet's oceans.
[www.newscientist.com/article/2587...](https://www.newscientist.com/article/2587329-venus-may-have-had-a-moon-for-nearly-2-billion-years/ )
[Venus may have had a moon for ...](https://www.newscientist.com/article/2587329-venus-may-have-had-a-moon-for-nearly-2-billion-years/ )

2026-09-03 01:20:14 UTC

Double whammy from me in New Scientist.
First, Saturn has a bizarre new decagon weather pattern at its south pole.
Would I say it's time for our viewers to crack each other's heads open and feast on the goo inside? Yes I would, Kent.
[www.newscientist.com/article/2587...](https://www.newscientist.com/article/2587345-saturn-has-a-big-weird-decagon-around-its-south-pole/ )
[Saturn has a big, weird decago...](https://www.newscientist.com/article/2587345-saturn-has-a-big-weird-decagon-around-its-south-pole/ )

2026-06-10 10:45:25 UTC

This is an amazingly well-reported story by [@joshuasokol.bsky.social@bsky.brid.gy](https://bsky.brid.gy/ap/did:plc:dtsjiy5p6siu5bsr7hsa2i4r ). And a wonderful use of "synecdoche".
[www.science.org/content/arti...](https://www.science.org/content/article/amid-flood-ai-advances-astrophysicists-are-questioning-soul-their-field )
[Amid a flood of AI advances, a...](https://www.science.org/content/article/amid-flood-ai-advances-astrophysicists-are-questioning-soul-their-field )

2026-05-18 15:42:28 UTC

Astronomers have waited years for Rubin to come online.
Now a trickle of data has begun to flow down before the floodgates open, with discoveries already being made.
“It almost doesn’t feel real”
Story by me in [@quantamagazine.bsky.social@bsky.brid.gy](https://bsky.brid.gy/ap/did:plc:vfktz6qe6vy7serr3wqutpzt )
[www.quantamagazine.org/rubin-tracks...](https://www.quantamagazine.org/rubin-tracks-skyscraper-size-asteroids-failed-supernovas-and-interstellar-visitors-20260515/ )
[Rubin Tracks Skyscraper-Size A...](https://www.quantamagazine.org/rubin-tracks-skyscraper-size-asteroids-failed-supernovas-and-interstellar-visitors-20260515/#comments )

2026-01-16 03:50:12 UTC

This is pretty wild
[www.propublica.org/article/spac...](https://www.propublica.org/article/spacex-faa-launch-airlines-safety-explosions-florida-caribbean )
[“We’re Too Close to the Debris...](https://www.propublica.org/article/spacex-faa-launch-airlines-safety-explosions-florida-caribbean )

2025-09-02 03:01:20 UTC

Possibly the best graph ever. You are more likely to die from an asteroid destroying Earth than a skydiving accident, being struck by lightning, or being trampled by an elephant.
https://shiitake.us-east.host.bsky.network/xrpc/com.atproto.sync.getBlob?did=did:plc:vcjhk6pveljuwujipu56ggau&cid=bafkreiars24jcwe72kgwd3mqkiejyxz5sau6adtab52toysjktopclvlfa