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Dr Dave Clements

@davecl.bsky.social
1.6K followers 689 following 3.2K posts

Astrophysicist at Imperial College. Extragalactic astronomy, observational cosmology, astrobiology. Writes science fiction. Not speaking for anybody. Science for Fiction podcast open.spotify.com/show/7HzQoyNyNI115…

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Dr Dave Clements @davecl.bsky.social · 08/09/2026
The PDP8e was at school, complete with teletypes and paper tapes. The first machine I had at home was an Apple ][
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Dr Dave Clements @davecl.bsky.social · 25/08/2026
Best Star Trek crew, wrong answers only.
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Dr Dave Clements @davecl.bsky.social · 12/08/2026
We got an upgrade in time for local maximum
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Dr Dave Clements @davecl.bsky.social · 12/08/2026
Some idd clod shadow effects?
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Dr Dave Clements @davecl.bsky.social · 12/08/2026
Using an improvised projection screen on a lamp post but then clouds!
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Dr Dave Clements @davecl.bsky.social · 12/08/2026
Eclipse day heron
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Dr Dave Clements @davecl.bsky.social · 06/07/2026
A local resident I spotted while walking along the canal this morning
A heron stands on a canal bank gazing into the water
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Dr Dave Clements @davecl.bsky.social · 29/06/2026
Poster from the @royalastrosoc.bsky.social about the disastrous cuts planned for fundamental physics research in the UK. Write to your MP about this!
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Dr Dave Clements @davecl.bsky.social · 19/06/2026
I'm there, as seen below. Oddly without the title and middle initial it can't find me at all.
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Dr Dave Clements @davecl.bsky.social · 13/06/2026
Today’s haul
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Dr Dave Clements @davecl.bsky.social · 12/06/2026
The harvest continues
A ramekin full of alpine strawberries
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Dr Dave Clements @davecl.bsky.social · 07/06/2026
You can even make them aircraft carriers if you do it right - though this is doing it wrong.
Harrier jump jet that has landed badly on a container ship
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Dr Dave Clements @davecl.bsky.social · 06/06/2026
This morning’s breakfast haul
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Dr Dave Clements @davecl.bsky.social · 02/06/2026
And so it begins… First strawberries from the garden.
A  ramekin of freshly pick bright red alpine strawberries
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Dr Dave Clements @davecl.bsky.social · 21/05/2026
Not just a WW2 problem external-content.duckduckgo.com/iu/?u=https%...
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Dr Dave Clements @davecl.bsky.social · 07/05/2026
Hotblack Desiato in contrast has more serious problems
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Dr Dave Clements @davecl.bsky.social · 25/04/2026
A friendly bird I found in the woods today
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Dr Dave Clements @davecl.bsky.social · 22/04/2026
Today we helped build a polytunnel!
A newly completed polytunnel on Skye, just waiting for the doors & windows to be fitted.
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Dr Dave Clements @davecl.bsky.social · 18/04/2026
Chaffinch on Skye
A chaffinch perched on the top of a pine tree singing against a background of blue sky.
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Dr Dave Clements @davecl.bsky.social · 28/01/2026
Snowdrops are coming! Much needed sign in these difficult times that spring is on its way.
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Dr Dave Clements @davecl.bsky.social · 12/01/2026
If you see this post an archer
David Archer from the famous BBC Radio 4 series, The Archers
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Dr Dave Clements @davecl.bsky.social · 28/11/2025
Lots of ideas from the BBC circa 1970…
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Dr Dave Clements @davecl.bsky.social · 27/11/2025
While they're making an important point about England and Wales you'd think a journalist who works for the FT and Telegraph would know that there are no A-levels in Scotland at all. Scotland has Highers, and a very different educational system. @helenbarrett.bsky.social
A BlueSky post from Helen Barrett that says: Art history A-level is extinct in Scotland and Wales and nearly extinct in England. The UK has the third-biggest art market in the world ($11bn-ish), if you need a business case to prove its value.
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Dr Dave Clements @davecl.bsky.social · 20/10/2025
Your new local?
The sign for a pub called The Slaughtered Lamb, featuring the severed head of a wolf.
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Dr Dave Clements @davecl.bsky.social · 15/10/2025
Not forgetting
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Dr Dave Clements @davecl.bsky.social · 08/09/2025
"Think back to your childhood. Do you remember when the anxiety started?" www.bbc.co.uk/iplayer/epis...
A traffic warden with a bandaged face holds an assault rifle while buildings burn in the background.
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Dr Dave Clements @davecl.bsky.social · 18/08/2025
Posting my ballot paper for strike action at @imperialcollegeldn.bsky.social @ucu.org.uk @vjt.bsky.social
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Dr Dave Clements @davecl.bsky.social · 23/07/2025
Our latest rebranding cost at least half a million and all we got was a dreadful I
A white letter I on a dark blue background in a horrid serif font
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Dr Dave Clements @davecl.bsky.social · 20/07/2025
Universal healthcare systems are generally cheaper than the US system, so a shift from corporate for profit insurance to a state run system could save money and cover everyone
Bar graph showing the US has per capita spending on health in 2021 of $12318 per year with all rich nations much cheaper. The next most expensive is Germany at $7383 with the UK NHS at $5387.
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Dr Dave Clements @davecl.bsky.social · 11/07/2025
Oh Nigel - I think we've peaked too early!
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Dr Dave Clements @davecl.bsky.social · 30/06/2025
Doomwatch got there first
Cover of the book Mutant 59: The Plastic Eater by Kit Pedler and Gerry Davis
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Dr Dave Clements @davecl.bsky.social · 20/06/2025
Yes. Some of the small ones might *just* be portable enough to take on a march, but the contents won't last long and they'll have you marked as someone carrying something potentially hazardous, so you'll be taken out. It's also probably illegal to take LN on public transport in any case.Liquidn
Liquid nitrogen dewars of various sizes from 4 to 50 litres. Only the smallest of them are hand portable.
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Dr Dave Clements @davecl.bsky.social · 17/06/2025
Me and my Bsky bubble upload.wikimedia.org/wikipedia/co...
The Raft of the Medusa
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Dr Dave Clements @davecl.bsky.social · 09/06/2025
Alpine strawberries fresh from the garden!
Fresh strawberries in a glass pot
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Dr Dave Clements @davecl.bsky.social · 09/06/2025
The threat to astronomy - image of the sky from Mongolia showing dozens of trails from Starlink and other NEO satellites. Image credit: Xin Wang, Mongolia 🧪🔭
A picture of the night sky with a vast swatch covered by multiple streaks from Starlink and other NEO satellites.
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Dr Dave Clements @davecl.bsky.social · 07/06/2025
And so it begins #SummerHarvest
Two pots full of rec berry fruits
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Dr Dave Clements @davecl.bsky.social · 31/03/2025
It's even harder at Avebury
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Dr Dave Clements @davecl.bsky.social · 29/03/2025
We have partial eclipse pacmen! Taken using a colander acting as multiple pinhole cameras to safely image the Sun. Hat tip to @astroroyalscot.bsky.social
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Dr Dave Clements @davecl.bsky.social · 27/03/2025
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Dr Dave Clements @davecl.bsky.social · 02/03/2025
Our friendly robin waiting for us to dig up some worms.
Ted breated robin perching on s branch amid undergrowth
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Dr Dave Clements @davecl.bsky.social · 20/02/2025
From the CHOIR collaboration: To stand with our community in physics, astronomy, & planetary science affected by the federal grant funding freeze we (choir, Black in Astro, Astro Poverty Survey, Movement Consulting) have organized a mutual aid initiative. www.choircollaboration.com/mutual-aid 🔭🧪
A poster for the CHOIR mutual aid support fund including a QR code to the GoFundMe link for donations
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Dr Dave Clements @davecl.bsky.social · 07/02/2025
Is this to be the future of science under Musk and Trump? [Hat tip to Mischa Schirmer] 🧪🔭
A potential Trump document to make Space Great Again by setting the values of c, Lambda and Omega by fiat, eliminating budget deficits by rejecting negative numbers, and revoking all PhDs, among many other things.
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Dr Dave Clements @davecl.bsky.social · 07/02/2025
Unboxing of the Simons Observatory LAT primary mirror begins! 🧪🔭
A large crane prepares to lift the mirror of the Simons Observatory Large Aperture telescope's 6m primary mirror out of its crate.
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Dr Dave Clements @davecl.bsky.social · 28/01/2025
If you see this post, post a pic from your device without an explanation
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Dr Dave Clements @davecl.bsky.social · 26/01/2025
The Nazgul from George RR Martin's The Armageddon Rag www.google.com/url?sa=i&url...
Pat Hobbins dressed as the With King of Angmar playing electric guitar as part of the band The Nagzul.
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Dr Dave Clements @davecl.bsky.social · 17/01/2025
I always rather like the Pennington covers used in the UK
A man, hooded and cloacked, with a sword slung over his back strides through a deserted fantasy city
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Dr Dave Clements @davecl.bsky.social · 09/12/2024
From Sean McFate...
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Dr Dave Clements @davecl.bsky.social · 07/12/2024
Tree came down this afternoon not far from where we are in Brum, blocking a major bus route. Thankfully nobody hurt. And the storm continues.
Large mature treen blocking road.
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Dr Dave Clements @davecl.bsky.social · 17/11/2024
Miss Hawthorn, white witch from DrWho story The Daemons
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Dr Dave Clements @davecl.bsky.social · 17/11/2024
Or trandems!
The Goodies on their three person tandem.
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