馃敶 The 'Little red dots' observed by Webb were direct-collapse black holes
https://phys.org/news/2026-02-red-dots-webb-collapse-black.html
hypebot
and 1 other
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The full scope of Paranal鈥檚 beauty 馃ぉ
Right in front, one of the movable ATs stands tall, while the UTs are scanning the sky.
The lasers emerging from the UTs create each a bright artificial star on the sky to correct observations for the blurring effect of the atmosphere. Until recently, only one UT was equipped with lasers. But now one additional laser has been installed in the other 3.
Discover why: https://www.eso.org/public/images/potw2606a/
馃摲 A. Trigo/ESO
The full scope of Paranal鈥檚 beauty 馃ぉ
Right in front, one of the movable ATs stands tall, while the UTs are scanning the sky.
The lasers emerging from the UTs create each a bright artificial star on the sky to correct observations for the blurring effect of the atmosphere. Until recently, only one UT was equipped with lasers. But now one additional laser has been installed in the other 3.
Discover why: https://www.eso.org/public/images/potw2606a/
馃摲 A. Trigo/ESO
fresco
boosted
Peek inside ESO's Extremely Large Telescope (ELT), under construction in #Chile 's Atacama Desert. The main structure shown here will host the ELT鈥檚 five mirrors, which will gather the light and send it to the instruments at the sides of the telescope.
With its 39-metre-diameter, the main mirror will be the largest ever for an optical telescope: the biggest eye on the sky!
Read more: https://www.eso.org/public/images/potw2605a/
馃摲 ESO/J. C. Mu帽oz-Mateos
Peek inside ESO's Extremely Large Telescope (ELT), under construction in #Chile 's Atacama Desert. The main structure shown here will host the ELT鈥檚 five mirrors, which will gather the light and send it to the instruments at the sides of the telescope.
With its 39-metre-diameter, the main mirror will be the largest ever for an optical telescope: the biggest eye on the sky!
Read more: https://www.eso.org/public/images/potw2605a/
馃摲 ESO/J. C. Mu帽oz-Mateos
Luke Drury
boosted
While I am at it: the Soci茅t茅 Fran莽aise d'Astronomie et d'Astrophysique @sf2a - French society of professional astronomers - joined almost a year ago. And while "42 followers" definitely *is* a nice number, there are even nicer numbers they should be able to achieve, n'est-ce pas?
馃憖 @GermanAstroSoc @EuroGeosciences @DPGPhysik @europeanphysicalsociety
#astrodon #astronomie #astronomy #astrophysics #France #sf2a
While I am at it: the Soci茅t茅 Fran莽aise d'Astronomie et d'Astrophysique @sf2a - French society of professional astronomers - joined almost a year ago. And while "42 followers" definitely *is* a nice number, there are even nicer numbers they should be able to achieve, n'est-ce pas?
馃憖 @GermanAstroSoc @EuroGeosciences @DPGPhysik @europeanphysicalsociety
#astrodon #astronomie #astronomy #astrophysics #France #sf2a
Fabrizio Musacchio
boosted
A few highlights from lecture yesterday at Nordita, about numerical techniques to evolve magnetic fields in cosmological simulations and (try to) simulate small-scale dynamo amplification.
Message 1. there is no best method for all needs: it depends
Message 2: they all are anyway wrong as they probe a different regime of plasma than is in nature - the best we can do is to hope we can extrapolate results to the right regime.
(with quote by @jaztrophysicist ) #astronomy #astrophysics #science
4 media
A few highlights from lecture yesterday at Nordita, about numerical techniques to evolve magnetic fields in cosmological simulations and (try to) simulate small-scale dynamo amplification.
Message 1. there is no best method for all needs: it depends
Message 2: they all are anyway wrong as they probe a different regime of plasma than is in nature - the best we can do is to hope we can extrapolate results to the right regime.
(with quote by @jaztrophysicist ) #astronomy #astrophysics #science
4 media
One piece of yesterday lectures at Nordita from our #COSMOMAG school: how a discovery during the late stage of M. #Faraday's career turned a failure in optical astronomy into a vertiginous progress for radio astronomy.
"Faraday Rotation" is the most powerful we have to perform magnetic tomography of the Universe and study the 3 dimensional distribution of B in clusters and possibly filaments of galaxies
3 media
joene extra
and 2 others
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#Aurora over Europe!
We're currently experiencing a strong geomagnetic storm, which caused a stunning auroral display all over Europe last night. This time-lapse was captured by our colleague Stefan Str枚bele over our headquarters in Garching near Munich.
馃摴 S. Str枚bele/ESO
#astrodon #astronomy #astrophysics #astrophotography #space #science
#Aurora over Europe!
We're currently experiencing a strong geomagnetic storm, which caused a stunning auroral display all over Europe last night. This time-lapse was captured by our colleague Stefan Str枚bele over our headquarters in Garching near Munich.
馃摴 S. Str枚bele/ESO
#astrodon #astronomy #astrophysics #astrophotography #space #science
String Theory Can Now Describe a Universe That Has Dark Energy
#HackerNews #StringTheory #DarkEnergy #QuantumPhysics #UniverseScience #Astrophysics
hypebot
and 2 others
boosted
Not all rings are forged in fantasy, my precious!
For astronomers, they are found in space and are debris discs, the leftovers of planet formation around stars. You can admire 24 of them in these ALMA images (orange = dust, blue = gas).
The origin of gas in debris discs is debated, and the disc in the two images at the top-right is very interesting in this regard. Here鈥檚 why: https://www.eso.org/public/images/potw2603a/
馃摲 ALMA(ESO/NAOJ/NRAO)/S. Marino et al.
Not all rings are forged in fantasy, my precious!
For astronomers, they are found in space and are debris discs, the leftovers of planet formation around stars. You can admire 24 of them in these ALMA images (orange = dust, blue = gas).
The origin of gas in debris discs is debated, and the disc in the two images at the top-right is very interesting in this regard. Here鈥檚 why: https://www.eso.org/public/images/potw2603a/
馃摲 ALMA(ESO/NAOJ/NRAO)/S. Marino et al.