Anders Johansen 🪨🌍🇺🇦
@astroandersj.bsky.social
Theoretical astrophysicist, with expertise in planet formation. Head of Planet Formation Group at University of Copenhagen / Lund University. Opinions my own.
https://sites.google.com/view/planet-formation-group/group-members
https://sites.google.com/view/planet-formation-group/group-members
I really recommend this long read about Pakistan’s solar power boom.
Pakistan went full renewables slowly, slowly then all at once, importing 22GW of solar panels in 2024 - to multiply its installed solar capacity by 17 times in just 1 year
That’s more solar than the UK added in the past 5 years combined
cleantechnica.com/2025/04/04/p...
That’s more solar than the UK added in the past 5 years combined
cleantechnica.com/2025/04/04/p...
Pakistan’s 22 GW Solar Shock: How a Fragile State Went Full Clean Energy - CleanTechnica
Pakistan’s solar boom, EV rise, and climate action signal a historic shift from fragility to clean tech leadership across Asia’s most unexpected energy frontier.
cleantechnica.com
April 5, 2025 at 12:20 PM
I really recommend this long read about Pakistan’s solar power boom.
Reposted by Anders Johansen 🪨🌍🇺🇦
Advertisement!:
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
Dust to DNA 2024
www.dust2dna.dk
March 31, 2025 at 11:16 AM
Advertisement!:
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
“Sure we need to address global warming. But what about China?”
China's dominance in clean energy cannot be overstated.
March 12, 2025 at 10:52 AM
“Sure we need to address global warming. But what about China?”
Meanwhile in Heidelberg. Europe waking up to seeing our closest ally now run by conspiracy theorists and their sycophants.
March 6, 2025 at 6:36 AM
Meanwhile in Heidelberg. Europe waking up to seeing our closest ally now run by conspiracy theorists and their sycophants.
Let's see how many astrophysicists are on this platform compared to the other one.
I want to advertise quickly a paper first-authored by my soon-finishing PhD student Jesper Nielsen, on the formation of the so-called radius valley for small exoplanets.
arxiv.org/abs/2502.10186
I want to advertise quickly a paper first-authored by my soon-finishing PhD student Jesper Nielsen, on the formation of the so-called radius valley for small exoplanets.
arxiv.org/abs/2502.10186
https://arxiv.org/abs/2502.10186
t.co
February 25, 2025 at 3:24 PM
Let's see how many astrophysicists are on this platform compared to the other one.
I want to advertise quickly a paper first-authored by my soon-finishing PhD student Jesper Nielsen, on the formation of the so-called radius valley for small exoplanets.
arxiv.org/abs/2502.10186
I want to advertise quickly a paper first-authored by my soon-finishing PhD student Jesper Nielsen, on the formation of the so-called radius valley for small exoplanets.
arxiv.org/abs/2502.10186
Pessimists sound clever.
Optimists change the world.
Optimists change the world.
Pessimists sound clever.
Optimists change the world.
I love this depiction of the energy transition by RMI.
Optimists change the world.
I love this depiction of the energy transition by RMI.
February 14, 2025 at 8:34 PM
Pessimists sound clever.
Optimists change the world.
Optimists change the world.
I published a rebuttal today in reaction to a recent claim that Earth did not form by pebble accretion. Our conclusion is that Earth likely formed by a combination of pebble accretion, large impactors and a giant impact. Questions and comments welcome.
arxiv.org/abs/2411.17043
arxiv.org/abs/2411.17043
Comment on "Did the terrestrial planets of the Solar System form by pebble accretion?"
Morbidelli, Kleine & Nimmo (2024) (MKN) recently published a critical analysis on whether the terrestrial planets in the Solar System formed by rapid pebble accretion or by the classical route of mult...
arxiv.org
November 27, 2024 at 1:48 PM
I published a rebuttal today in reaction to a recent claim that Earth did not form by pebble accretion. Our conclusion is that Earth likely formed by a combination of pebble accretion, large impactors and a giant impact. Questions and comments welcome.
arxiv.org/abs/2411.17043
arxiv.org/abs/2411.17043
Story in Scientific American about Vega’s planet-free debris disc. With quotes from me. I think it’s because of the low metallicity.
www.scientificamerican.com/article/famo...
www.scientificamerican.com/article/famo...
Famous Star Hasn’t Formed Planets, and We Don’t Know Why
The nearby star Vega, featured in the 1997 movie Contact, appears to have a smooth disk devoid of giant planets for reasons we can’t explain
www.scientificamerican.com
November 19, 2024 at 7:56 PM
Story in Scientific American about Vega’s planet-free debris disc. With quotes from me. I think it’s because of the low metallicity.
www.scientificamerican.com/article/famo...
www.scientificamerican.com/article/famo...
NASA's Webb Findings Support Long-Proposed Process of Planet Formation
"Webb finally revealed the connection between water vapor in the inner disk and the drift of icy pebbles from the outer disk" said principal investigator Andrea Banzatti
webbtelescope.org/contents/new...
"Webb finally revealed the connection between water vapor in the inner disk and the drift of icy pebbles from the outer disk" said principal investigator Andrea Banzatti
webbtelescope.org/contents/new...
November 11, 2023 at 7:24 AM
NASA's Webb Findings Support Long-Proposed Process of Planet Formation
"Webb finally revealed the connection between water vapor in the inner disk and the drift of icy pebbles from the outer disk" said principal investigator Andrea Banzatti
webbtelescope.org/contents/new...
"Webb finally revealed the connection between water vapor in the inner disk and the drift of icy pebbles from the outer disk" said principal investigator Andrea Banzatti
webbtelescope.org/contents/new...
Reposted by Anders Johansen 🪨🌍🇺🇦
Whoa, this new study by e.g. @astroandersj.bsky.social shows how you can rapidly form giant planets at wide orbits, avoiding immediate inward migration. This could potentially explain the large gaps in disks!
arxiv.org/abs/2311.04365
arxiv.org/abs/2311.04365
The formation of wide-orbit giant planets in protoplanetary disks...
The presence of distant protoplanets could explain the observed gaps in dust emission in protoplanetary disks. Here we derive a novel analytical model to describe the temporal decay of the pebble...
arxiv.org
November 10, 2023 at 9:21 AM
Whoa, this new study by e.g. @astroandersj.bsky.social shows how you can rapidly form giant planets at wide orbits, avoiding immediate inward migration. This could potentially explain the large gaps in disks!
arxiv.org/abs/2311.04365
arxiv.org/abs/2311.04365
A great community note from that other site.
October 6, 2023 at 3:38 PM
A great community note from that other site.
Reposted by Anders Johansen 🪨🌍🇺🇦
Tack för att ni följer.
October 5, 2023 at 4:36 PM
Tack för att ni följer.