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interplanetary.bsky.social
Dr James O'Donoghue 🪐
@interplanetary.bsky.social
4.6K followers 350 following 220 posts
Planetary scientist, astronomer and award-winning science communicator 🪐. Formerly at JAXA, NASA, Boston Uni, and the Uni of Leicester. Now Associate Professor at @UniofReading. Forbes 8 Billion Under 8 Billion. Website: odonoghuespace.github.io
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · 8d
Well done, matey!
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Reposted by Dr James O'Donoghue 🪐
planetdr.bsky.social
Sarah Hörst @planetdr.bsky.social · 28d
Everyone writing about Perseverance today should be asking how many of the scientists and engineers who were involved in this discovery no longer work for NASA bc of Trump.
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Sep 7
You'll get lucky with something else, I'm sure!
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Reposted by Dr James O'Donoghue 🪐
peterlewis55.bsky.social
Peter Lewis @peterlewis55.bsky.social · Sep 7
Lunar Eclipse - An hour after rising! #astronomy #astrophotography @stormhour.com @photohour.bsky.social
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Sep 7
Worst video ever, but go check out the lunar eclipse going on right now 🙂
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Reposted by Dr James O'Donoghue 🪐
peterlewis55.bsky.social
Peter Lewis @peterlewis55.bsky.social · Sep 7
Good luck UK Lunar Eclipse hunters. The Moon rises in the east in one hour!
The complete Total Lunar Eclipse as captured by me in September 2016.
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Sep 1
Join us for International Observe The Moon Night in-person (registration required) or online!🔭

Held and organized by the @uniofreading.bsky.social alongside Reading Astronomical Society, @royalastrosoc.bsky.social, Troodos Observatory (Cyprus) and supported by STFC
www.reading.ac.uk/news/2025/Un...
Observe the Moon Night University of Reading - University of Reading
www.reading.ac.uk
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Reposted by Dr James O'Donoghue 🪐
uk.theconversation.com
The Conversation UK @uk.theconversation.com · Aug 5
August 5 was a whole millisecond shorter. Strap in for the full explanation.
Why on Earth is the planet’s day getting shorter?
August 5 was a whole millisecond shorter. Strap in for the full explanation.
tcnv.link
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Aug 5
Yeah, haven't seen any reports just yet about that. Earthquakes appear to change LOD on the microsecond level, rather than millisecond, so it's a really small signal to detect. Looks like we could only do so by looking at Quasars(?!), which is just a wonderful connection
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Reposted by Dr James O'Donoghue 🪐
cosmicrami.com
CosmicRami 🏳️‍🌈🏳️‍⚧️ @cosmicrami.com · Aug 5
Time nerds! This is def. one for you!

Today was/is one of the shortest days of the year.

@interplanetary.bsky.social has got you covered as to many of the reasons why this is likely happening.

Bonus - how quasars, and #RadioAstronomy lead to precision timing, orientation, etc. that gives us GPS!
interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Aug 5
It's about time that I wrote this:

theconversation.com/why-on-earth...
Why on Earth is the planet’s day getting shorter?
August 5 was a whole millisecond shorter. Strap in for the full explanation.
theconversation.com
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Aug 5
Oh my god, it was such a pleasure to dig into, but so hard to contain myself! If I had more time, I would've made it shorter. Must stop making time puns, there's no time for it today...
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Aug 5
It's about time that I wrote this:

theconversation.com/why-on-earth...
Why on Earth is the planet’s day getting shorter?
August 5 was a whole millisecond shorter. Strap in for the full explanation.
theconversation.com
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Reposted by Dr James O'Donoghue 🪐
joncooper-us.bsky.social
Jon Cooper @joncooper-us.bsky.social · Aug 4
💯.
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Reposted by Dr James O'Donoghue 🪐
bart22.bsky.social
Bart B @bart22.bsky.social · Aug 4
Tiny black dot on Saturn. Early this morning, I photographed a rather rare astronomical event, a shadow transit of Saturn’s largest moon Titan across its parent planet. This is a composite of two frames. Questar telescope /Olympus camera. Observed from metro Chicago. #astrophotography
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · Jul 3
Does Avi not believe rocks are present outside the solar system
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Reposted by Dr James O'Donoghue 🪐
planetarysociety.bsky.social
The Planetary Society @planetarysociety.bsky.social · Jun 9
Our global petition to save NASA science closes this Thursday, and we’re just shy of 15,000 signatures! Every name counts, this petition will be hand-delivered to members of Congress. Add yours today, Save NASA Science.
planet.ly/petition
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Reposted by Dr James O'Donoghue 🪐
vincentledvina.bsky.social
Vincent Ledvina @vincentledvina.bsky.social · Jun 1
The auroral oval seen from space during the early morning on June 1 - captured by the NOAA-21 satellite flying over North America
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Reposted by Dr James O'Donoghue 🪐
aswogeosphere.bsky.social
Austrian Space Weather Office @aswogeosphere.bsky.social · Jun 1
Update on the ongoing geomagnetic storm: the main magnetic core of the 31 May #solarstorm has arrived at Earth starting around 1 June 12 UTC, BUT it is one of those kinds that are VERY unfavorable for #aurora - the field is entirely northward and very likely to remain so for the next few hours.
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Reposted by Dr James O'Donoghue 🪐
mathewjowens.bsky.social
Mathew Owens @mathewjowens.bsky.social · Jun 1
Looks like that fast CME is here already, about 2.5 hours before our predicted window.

Funnily enough, we've *just* worked out why fast CMEs are often earlier than predicted and will be rolling this into the forecast soon!

agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Implications of Using Spheroidal “Cone Model” CMEs in Solar‐Wind Models
Slow spheroidal CMEs produce much longer transit times to 1 AU than observed Wide spheroidal CMEs produce much faster speeds at 1 AU than observed Fixed-duration CMEs, which mimic observed CME e...
agupubs.onlinelibrary.wiley.com
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Reposted by Dr James O'Donoghue 🪐
espiegler.bsky.social
eileen @espiegler.bsky.social · Jun 1
The WH proposes $6 billion cut in NASA budget, an overall 24% reduction from previous year – and a shocking 47% cut in funding for NASA’s Science Mission Directorate [reductions to to NASA’s fleet of spacecraft already in space, or proposed], an extinction-level event for the Earth & space sciences.
Proposed NASA cuts to space science: “Staggering”
earthsky.org
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · May 31
an older man with white hair and a beard is talking to another man .
ALT: an older man with white hair and a beard is talking to another man .
media.tenor.com
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · May 31
This Wrexham lad made good
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Reposted by Dr James O'Donoghue 🪐
mathewjowens.bsky.social
Mathew Owens @mathewjowens.bsky.social · May 31
There's a fast CME heading into some fast solar wind and some pre-existing slower CMEs. We're currently putting arrival at noon-to-midnight tomorrow, but this forecast may change as more observations become available.

Updates here: research.reading.ac.uk/met-spate/hu...
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Reposted by Dr James O'Donoghue 🪐
kevinkhu.bsky.social
Kevin Hardegree-Ullman @kevinkhu.bsky.social · May 30
Please, please, please contact your representatives. Jobs like mine are on the line. 🔭🧪☄️

www.planetary.org/save-nasa-sc...
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interplanetary.bsky.social
Dr James O'Donoghue 🪐 @interplanetary.bsky.social · May 30
Sorry, I hope it doesn't go through like this. Any idea when everyone will know?
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