Marek Ziebart
@marekziebart.bsky.social
Professor of Space Geodesy, University College London. Me: mathematics, space technology, music, art, literature, philosophy, geopolitics.
Pinned
Marek Ziebart
@marekziebart.bsky.social
· Jul 30
To 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.
Looking forward to speaking at St Cross College, Oxford on 22 Nov for “A Physical History of Navigation.”
It’s free to attend — online or in person.
Register here: www.stx.ox.ac.uk/event/happ-o...
#Navigation #SpaceTech #ScienceHistory #GNSS #Oxford #SpaceScience #RIN
It’s free to attend — online or in person.
Register here: www.stx.ox.ac.uk/event/happ-o...
#Navigation #SpaceTech #ScienceHistory #GNSS #Oxford #SpaceScience #RIN
HAPP One-Day Conference - A Physical History of Navigation
This conference will examine the physical history of navigation, beginning with how ancient civilisations navigated by the stars and other celestial bodies.
www.stx.ox.ac.uk
November 16, 2025 at 4:02 PM
Looking forward to speaking at St Cross College, Oxford on 22 Nov for “A Physical History of Navigation.”
It’s free to attend — online or in person.
Register here: www.stx.ox.ac.uk/event/happ-o...
#Navigation #SpaceTech #ScienceHistory #GNSS #Oxford #SpaceScience #RIN
It’s free to attend — online or in person.
Register here: www.stx.ox.ac.uk/event/happ-o...
#Navigation #SpaceTech #ScienceHistory #GNSS #Oxford #SpaceScience #RIN
Incredible progress from Blue Origin. #space #spacetechnology #Mars
Source: YouTube share.google/5C36x34e4Y8A...
Source: YouTube share.google/5C36x34e4Y8A...
Blue Origin aces launch and landing of New Glenn, sends NASA's ESCAPADE en route to Mars
Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
share.google
November 15, 2025 at 3:39 PM
Incredible progress from Blue Origin. #space #spacetechnology #Mars
Source: YouTube share.google/5C36x34e4Y8A...
Source: YouTube share.google/5C36x34e4Y8A...
This 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.
September 12, 2025 at 12:33 PM
This 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.
Reposted by Marek Ziebart
🧭📡 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:
✨ Reminisce about the beginnings
🚀 Relive incredible milestones
👏 Acknowledge every contributor
🌍 Meet the faces shaping the future
From the early days of EGNOS to the global reach of Galileo, we take this moment to:
✨ Reminisce about the beginnings
🚀 Relive incredible milestones
👏 Acknowledge every contributor
🌍 Meet the faces shaping the future
September 2, 2025 at 11:57 AM
🧭📡 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:
✨ Reminisce about the beginnings
🚀 Relive incredible milestones
👏 Acknowledge every contributor
🌍 Meet the faces shaping the future
From the early days of EGNOS to the global reach of Galileo, we take this moment to:
✨ Reminisce about the beginnings
🚀 Relive incredible milestones
👏 Acknowledge every contributor
🌍 Meet the faces shaping the future
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
www.bbc.co.uk/news/article... Jim Lovell, who guided Apollo 13 safely back to Earth, dies aged 97 - BBC News
Jim Lovell, who guided Apollo 13 safely back to Earth, dies aged 97
Commander of Apollo 13, who rescued his men from a near certain death in space, has died aged 97.
www.bbc.co.uk
August 8, 2025 at 8:11 PM
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
www.bbc.co.uk/news/article... Jim Lovell, who guided Apollo 13 safely back to Earth, dies aged 97 - BBC News
To 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.
July 30, 2025 at 11:07 AM
To 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.
8.8 magnitude tsunamigenic earthquake reported on Kamchatka peninsula, Russia. It’s worth bearing in mind early estimates of the size of large earthquakes are often too low.
July 30, 2025 at 6:01 AM
8.8 magnitude tsunamigenic earthquake reported on Kamchatka peninsula, Russia. It’s worth bearing in mind early estimates of the size of large earthquakes are often too low.