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Posts by Jonathan O'Callaghan

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What It Would Be Like to Surf Five Distant Planets What It Would Be Like to Surf Five Distant Planets: A surfing safari of the cosmos

Not enough articles about surfing in space

nautil.us/what-it-woul...

8 hours ago 6 0 0 0

Hey space people, I'm looking to speak to experts about the undiscovered irregular moons of the Solar System. How many might there be? What are they telling us?

If that's you, do get in touch: jdaoca[at]gmail[dot]com

Thanks!

12 hours ago 3 3 0 0

But always room for more. Editors, if you're in need of any space writing, do get in touch.

1 day ago 2 0 0 0

It's amazing what a holiday can do to refresh the brain. Working on so many fun stories at the moment on moons, telescopes, nuclear propulsion, and more!

1 day ago 4 0 1 0

Yeah, presumably. It's the new PR version of "Dear [insert name here]"

1 day ago 2 0 0 0

I'm getting offered interviews with so many experts at the moment. Is it an AI thing? Can't work it out.

1 day ago 2 0 1 1
Picture of the Great Wall of China

Picture of the Great Wall of China

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Saw the Great Wall of China today. Can confirm it was pretty great.

1 week ago 9 0 1 0
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My latest!

1 week ago 1 0 0 0
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Quite nice here!

2 weeks ago 1 0 0 0
Image of someone’s phone with traffic light symbols

Image of someone’s phone with traffic light symbols

Cool thing about China (currently in Shanghai): all the lights work on some sort of centralised system so you can see how long until they change on map apps.

2 weeks ago 7 0 1 0
Spectacular high-resolution image of our home planet viewed through the Orion Crew Module window by the Artemis II astronauts as they continue their journey to the Moon on Flight Day 2, 3 April 2026 (pic: NASA)

Spectacular high-resolution image of our home planet viewed through the Orion Crew Module window by the Artemis II astronauts as they continue their journey to the Moon on Flight Day 2, 3 April 2026 (pic: NASA)

A full disc image of Earth, as seen from the Orion Crew Module. The planet is a pale blue, swirling with white clouds and glowing slightly lighter blue in place from reflected light. At lower left, a large brown landmass is Africa, with Spain and Portugal with twinkling lights where the planet curves. At top right, auroras glow in a thin green glow, just barely separated from the planet's surface. Earth is set against the black of space (pic: NASA/R.Wiseman)

A full disc image of Earth, as seen from the Orion Crew Module. The planet is a pale blue, swirling with white clouds and glowing slightly lighter blue in place from reflected light. At lower left, a large brown landmass is Africa, with Spain and Portugal with twinkling lights where the planet curves. At top right, auroras glow in a thin green glow, just barely separated from the planet's surface. Earth is set against the black of space (pic: NASA/R.Wiseman)

😮 Awesome views from Day 2 of #Artemis II this morning.

@exploration.esa.int @esaearth.esa.int

2 weeks ago 2894 1061 23 172

So far in Bangkok there's... not a lot of interest in Artemis II. Spoke to quite a few Thai people today who simply weren't aware of it. Maybe that'll change when it reaches the Moon!

2 weeks ago 2 0 0 0

Amazing footage. Great view of the launch at 23:50.

2 weeks ago 3 1 0 0

Last time humans went to the moon Tottenham Hotspur were (nearly) on the cusp of relegation. Glad there are no parallels to be drawn today.

2 weeks ago 5 0 0 0
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Artemis ii

2 weeks ago 2279 614 39 64
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Rocket Lab’s next step

If you've got a hankering for rockets, why not read my latest story for Aerospace America, all about Rocket Lab's upcoming Neutron rocket. Fun!

aerospaceamerica.aiaa.org/features/roc...

2 weeks ago 5 1 0 0
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Rocket Lab’s next step

If you've got a hankering for rockets, why not read my latest story for Aerospace America, all about Rocket Lab's upcoming Neutron rocket. Fun!

aerospaceamerica.aiaa.org/features/roc...

2 weeks ago 5 1 0 0

Glad you made it!

2 weeks ago 1 0 0 0

Cool graphic

2 weeks ago 9 2 0 0

Think they missed nearly every major moment

2 weeks ago 9 0 1 0

Did NASA TV hire the F1 TV director

2 weeks ago 17 0 2 0

How do LLMs deal with April Fools papers? Can they tell they aren’t real?

2 weeks ago 2 0 1 0
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‘This feels fragile’: how a satellite-smashing chain reaction could spiral out of control Today, the space around Earth can no longer be considered empty. More than 30,000 objects are in orbit, and that figure is rising exponentially

Some cool graphics here

www.theguardian.com/science/ng-i...

2 weeks ago 3 1 0 1

Does anyone know if China is planning an equivalent of Artemis II (i.e. crewed lunar flyby/orbit) before their landing in 2030, or not?

2 weeks ago 4 0 0 0

Yes but it’s still worthwhile taking this semi seriously just to show what would happen. Even 10% would be huge.

3 weeks ago 0 0 0 0
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Thank you Alejandro

3 weeks ago 0 0 0 0

I must be one of like two people in the world that’s excited to have just done an interview with the International Telecommunications Union.

3 weeks ago 7 0 3 0
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One million satellites will perform billions of manoeuvres In the last few weeks I’ve written a couple of posts about SpaceX’s plans for 1 million Orbital Data Centres (ODCs). The first of those posts used the Federal Communication Commission's (FCC’s) own ra...

Here is Hugh's very good post on this (actually he says 4 billion, not 1 billion).

www.linkedin.com/pulse/one-mi...

3 weeks ago 3 0 1 0

This is like the Titanic night sky

3 weeks ago 14 2 0 0

Amazing stat from space debris expert Hugh Lewis: if SpaceX launches 1 million orbital data centre satellites it will have to perform 1 billion collision avoidance manoeuvres every year, or one manoeuvre every 0.03 seconds

3 weeks ago 87 56 4 6