PS Of course, Iβm a little disingenuous, we can create fusion on Earth. The trick is getting more energy out than you put in.
12.09.2025 12:41 β π 0 π 0 π¬ 0 π 0@marekziebart.bsky.social
Professor of Space Geodesy, University College London. Me: mathematics, space technology, music, art, literature, philosophy, geopolitics.
PS Of course, Iβm a little disingenuous, we can create fusion on Earth. The trick is getting more energy out than you put in.
12.09.2025 12:41 β π 0 π 0 π¬ 0 π 0This may come as a surprise, but nuclear fusion is already the most popular method of energy production not only in the US, but in the whole solar system. Only problem is you need a ball of gas with a mass of 1.989x10^30 kg (about 300,000 Earths). Apart from that, yeah, climate change, no problem.
12.09.2025 12:33 β π 2 π 0 π¬ 3 π 0Look very carefully and you can you see your future self looking back longingly through the tunnel and exclaiming, βRemember the good old days, back on the other side of the tunnel?β
12.09.2025 11:48 β π 0 π 0 π¬ 0 π 0And then, Jo Rabbit (metamorphed from the oh-so-inappropriate Lupo) and his plucky band of philosopher coneys (fleeing the myxomatosis that is British political philosophy) infiltrate the Warren, escape and defeat General Trumpwort on the slopes of Watergate Down. Get in!
12.09.2025 11:36 β π 1 π 0 π¬ 0 π 0π§π‘ Today, we celebrate 30 years of European satellite navigation.
From the early days of EGNOS to the global reach of Galileo, we take this moment to:
β¨ Reminisce about the beginnings
π Relive incredible milestones
π Acknowledge every contributor
π Meet the faces shaping the future
Actually, yes. I have worked for over two years (with the OECD) on a proposal for a new UN Sustainable Development Goal (SDG) for the space environment and space traffic management (SDG18). Iβm about to publish some of that.
02.09.2025 12:24 β π 1 π 0 π¬ 0 π 0Hi Maya - the short answer is a resounding no. But a few of us are trying to formulate plans, models and technology roadmaps. A more disturbing issue is that the general population are unaware of decisions being taken by powerful commercial actors that potentially affect the future of all.
01.09.2025 20:13 β π 1 π 0 π¬ 1 π 0Andβ¦
Oh, do the Hokey Cokey
Oh, do the Hokey Cokey
Oh, do the Hokey Cokey
Thatβs what itβs all about.
You put your tariffs up,
You put your tariffs down,
Up. Down. Shake βem all around.
You do the Hokey Cokey,
And you meet Poo-Tin
Thatβs what itβs all about.
Sad to learn of the passing of a true giant and hero.
www.bbc.co.uk/news/article... Jim Lovell, who guided Apollo 13 safely back to Earth, dies aged 97 - BBC News
Iβm minded of Kerouacβs quote in βOn the Roadβ (itβs not his line): βWhither goest thou, America, in thy shiny car in the night?β
06.08.2025 12:18 β π 1 π 0 π¬ 0 π 0To illustrate the coming congestion in that part of space. Here's a simulation my group did, first graphic 2019, second near-Earth space in 2028. Red dots - inactive satellites, yellow dots - active.
30.07.2025 11:07 β π 1 π 0 π¬ 1 π 0Would you settle for irritate? Indulge? Incite?
30.07.2025 06:08 β π 1 π 0 π¬ 0 π 08.8 magnitude tsunamigenic earthquake reported on Kamchatka peninsula, Russia. Itβs worth bearing in mind early estimates of the size of large earthquakes are often too low.
30.07.2025 06:01 β π 4 π 0 π¬ 0 π 0