Optimist: The cup is half full
Pessimist: The cup is half empty
Astronomer: This is a high metallicity sightline
Pessimist: The cup is half empty
Astronomer: This is a high metallicity sightline
Optimist: the cup is half full
Pessimist: the cup is half empty
Astrophysicist: the cup is full with an equal mixture of water and dark water.
Pessimist: the cup is half empty
Astrophysicist: the cup is full with an equal mixture of water and dark water.
Optimist: The cup is half full
Pessimist: The cup is half empty
Trademark lawyer: The shape of the cup fails to function as a #trademark and cannot be protected unless it acquires secondary meaning
Pessimist: The cup is half empty
Trademark lawyer: The shape of the cup fails to function as a #trademark and cannot be protected unless it acquires secondary meaning
November 23, 2024 at 5:50 PM
Optimist: The cup is half full
Pessimist: The cup is half empty
Astronomer: This is a high metallicity sightline
Pessimist: The cup is half empty
Astronomer: This is a high metallicity sightline
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paZywk
September 7, 2026 at 3:00 PM
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paZywk
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paZywk
August 27, 2026 at 6:00 PM
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paZywk
girl who almost understands metallicity
November 7, 2025 at 3:59 AM
girl who almost understands metallicity
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paZywk
March 2, 2025 at 7:00 PM
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paZywk
New #JWST 🔭 data release for target names: CHA-IR-NEBULA, OFF-FIELD-MIRI.
Credit: NASA, ESA, CSA, STScI.
Take a look at news_by_date.html
Credit: NASA, ESA, CSA, STScI.
Take a look at news_by_date.html
February 26, 2026 at 8:13 PM
New #JWST 🔭 data release for target names: CHA-IR-NEBULA, OFF-FIELD-MIRI.
Credit: NASA, ESA, CSA, STScI.
Take a look at news_by_date.html
Credit: NASA, ESA, CSA, STScI.
Take a look at news_by_date.html
If you flip it upside down the metallicity of the companion star goes way up 🤘🏽
February 6, 2026 at 12:19 AM
If you flip it upside down the metallicity of the companion star goes way up 🤘🏽
A great article (and a GREAT analogy) by @briles34.bsky.social about our recent exciting result about planets orbiting metal-poor stars (spoiler: there weren't any!).
www.popsci.com/science/plan...
www.popsci.com/science/plan...
What happens when you don’t have enough ingredients to make a planet?
NASA scientists observe evidence of a 'metallicity cliff' for the first time.
www.popsci.com
August 8, 2024 at 7:34 PM
A great article (and a GREAT analogy) by @briles34.bsky.social about our recent exciting result about planets orbiting metal-poor stars (spoiler: there weren't any!).
www.popsci.com/science/plan...
www.popsci.com/science/plan...
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paYR9k
March 11, 2025 at 12:00 AM
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paYR9k
James #Webb Space Telescope #JWST
Anatomy of a Low-Metallicity Starburst
TARGNAME= #NGC5253
DATE-OBS= 2024-07-13
PI_NAME = Hunt, Leslie
Inst: #NIRCam
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
Anatomy of a Low-Metallicity Starburst
TARGNAME= #NGC5253
DATE-OBS= 2024-07-13
PI_NAME = Hunt, Leslie
Inst: #NIRCam
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
July 16, 2025 at 10:04 PM
James #Webb Space Telescope #JWST
Anatomy of a Low-Metallicity Starburst
TARGNAME= #NGC5253
DATE-OBS= 2024-07-13
PI_NAME = Hunt, Leslie
Inst: #NIRCam
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
Anatomy of a Low-Metallicity Starburst
TARGNAME= #NGC5253
DATE-OBS= 2024-07-13
PI_NAME = Hunt, Leslie
Inst: #NIRCam
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
The STScI 2026 Spring Symposium aims to advance our understanding of the low-metallicity universe by bringing together researchers from May 11-15, 2026, to Baltimore, Maryland.
Registration closes on April 10.
Registration closes on April 10.
The Metal-Poor Frontier: Understanding Low-Metallicity Stars and Galaxies Across Cosmic Time
www.stsci.edu
April 3, 2026 at 4:45 PM
The STScI 2026 Spring Symposium aims to advance our understanding of the low-metallicity universe by bringing together researchers from May 11-15, 2026, to Baltimore, Maryland.
Registration closes on April 10.
Registration closes on April 10.
James #Webb Space Telescope #JWST
Tracing the evolution of circumstellar and protoplanetary disks at low metallicity
TARG: #LHA-120-N-159
2024-11-20
PI: Sabbi, Elena
NIRCAM f460 f444-470 f360 f335 f300 f210 f187 f140 f115
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
Tracing the evolution of circumstellar and protoplanetary disks at low metallicity
TARG: #LHA-120-N-159
2024-11-20
PI: Sabbi, Elena
NIRCAM f460 f444-470 f360 f335 f300 f210 f187 f140 f115
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
November 22, 2025 at 2:32 PM
James #Webb Space Telescope #JWST
Tracing the evolution of circumstellar and protoplanetary disks at low metallicity
TARG: #LHA-120-N-159
2024-11-20
PI: Sabbi, Elena
NIRCAM f460 f444-470 f360 f335 f300 f210 f187 f140 f115
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
Tracing the evolution of circumstellar and protoplanetary disks at low metallicity
TARG: #LHA-120-N-159
2024-11-20
PI: Sabbi, Elena
NIRCAM f460 f444-470 f360 f335 f300 f210 f187 f140 f115
yuval-harpaz.github.io/astro/jwst_l...
NASA/ESA/CSA/STScI/j. Roger
4/
offers a unique opportunity to study star formation in an environment with low metallicity. This allows scientists to better understand how stars formed in the early Universe, where metallicity was generally lower.
The presence of a region of ionized hydrogen around a massive O-type star
offers a unique opportunity to study star formation in an environment with low metallicity. This allows scientists to better understand how stars formed in the early Universe, where metallicity was generally lower.
The presence of a region of ionized hydrogen around a massive O-type star
January 22, 2025 at 12:47 PM
4/
offers a unique opportunity to study star formation in an environment with low metallicity. This allows scientists to better understand how stars formed in the early Universe, where metallicity was generally lower.
The presence of a region of ionized hydrogen around a massive O-type star
offers a unique opportunity to study star formation in an environment with low metallicity. This allows scientists to better understand how stars formed in the early Universe, where metallicity was generally lower.
The presence of a region of ionized hydrogen around a massive O-type star
NASA's Webb Telescope makes the first ever detection of silane in a brown dwarf. The brown dwarf was discovered by NASA citizen scientist Dan Caselden. Paper in Nature: "Silicate precursor silane detected in cold low-metallicity brown dwarf" rdcu.be/eDWlO #citizenscience #astronomy #news
Silicate precursor silane detected in cold low-metallicity brown dwarf
Nature - Silane, which is a precursor to the sandy surfaces of rocky planets and dusty clouds on gas giants, is seen directly in another world—a low-metallicity brown dwarf in which oxidation...
rdcu.be
September 3, 2025 at 3:26 PM
NASA's Webb Telescope makes the first ever detection of silane in a brown dwarf. The brown dwarf was discovered by NASA citizen scientist Dan Caselden. Paper in Nature: "Silicate precursor silane detected in cold low-metallicity brown dwarf" rdcu.be/eDWlO #citizenscience #astronomy #news
accidentally wrote “metallicity” as “meatallicity” and now I need to write an April fools paper about measuring meat abundances in exoplanet atmospheres
August 29, 2023 at 3:01 AM
accidentally wrote “metallicity” as “meatallicity” and now I need to write an April fools paper about measuring meat abundances in exoplanet atmospheres
James #Webb Space Telescope #JWST
Anatomy of a Low-Metallicity Starburst
#NGC5253
2025-02-22
PI: Hunt, Leslie
MIRI 2100+1130 M 1000 Y 770 C (NSV)
mast.stsci.edu/portal/Mashu...
NASA/ESA/CSA/STScI/j. Roger
Anatomy of a Low-Metallicity Starburst
#NGC5253
2025-02-22
PI: Hunt, Leslie
MIRI 2100+1130 M 1000 Y 770 C (NSV)
mast.stsci.edu/portal/Mashu...
NASA/ESA/CSA/STScI/j. Roger
February 23, 2026 at 3:08 PM
James #Webb Space Telescope #JWST
Anatomy of a Low-Metallicity Starburst
#NGC5253
2025-02-22
PI: Hunt, Leslie
MIRI 2100+1130 M 1000 Y 770 C (NSV)
mast.stsci.edu/portal/Mashu...
NASA/ESA/CSA/STScI/j. Roger
Anatomy of a Low-Metallicity Starburst
#NGC5253
2025-02-22
PI: Hunt, Leslie
MIRI 2100+1130 M 1000 Y 770 C (NSV)
mast.stsci.edu/portal/Mashu...
NASA/ESA/CSA/STScI/j. Roger
I didn’t know I needed my day to start with the astrophysical metallicity of a cauliflower, but I absolutely did.
Delicious silly science incoming:
Delicious silly science incoming:
Prompted by this and a need for distraction I Did Some Math. Turns out most extrasolar planets are quite cauliflower-compatible. A thread, with citations. And laboratory astrophysics. And footnotes.
What I want from Bluesky
December 2, 2024 at 12:46 PM
I didn’t know I needed my day to start with the astrophysical metallicity of a cauliflower, but I absolutely did.
Delicious silly science incoming:
Delicious silly science incoming:
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paYR9k
July 4, 2025 at 1:00 PM
James #Webb Space Telescope Stellar Populations and the Interstellar Medium Initial mass function in the lowest metallicity protocluster in the Galaxy - From Jacint Roger (landru79.bsky.social) - https://flic.kr/p/2paYR9k
ESA/Webb (@esa.int) images (Mar 17, 2025)
The spectrum of HR 8799 e shows high metallicity, with spectral fingerprints of carbon dioxide and carbon monoxide detected by Webb's NIRCam.
esawebb.org/images/weic2504c/
The spectrum of HR 8799 e shows high metallicity, with spectral fingerprints of carbon dioxide and carbon monoxide detected by Webb's NIRCam.
esawebb.org/images/weic2504c/
September 24, 2026 at 11:00 AM
ESA/Webb (@esa.int) images (Mar 17, 2025)
The spectrum of HR 8799 e shows high metallicity, with spectral fingerprints of carbon dioxide and carbon monoxide detected by Webb's NIRCam.
esawebb.org/images/weic2504c/
The spectrum of HR 8799 e shows high metallicity, with spectral fingerprints of carbon dioxide and carbon monoxide detected by Webb's NIRCam.
esawebb.org/images/weic2504c/
A wider sky view of S284
🔭 JWST Program 2317 - Initial mass function in the lowest metallicity protocluster in the Galaxy: www.stsci.edu/jwst-program...
data: SH2-284, released 2023-10-21
NASA, ESA, CSA, STSci/ #JWST NIRCam 470, 356, 182
Paper, 2025-09-10: iopscience.iop.org/article/10.3...
🔭 JWST Program 2317 - Initial mass function in the lowest metallicity protocluster in the Galaxy: www.stsci.edu/jwst-program...
data: SH2-284, released 2023-10-21
NASA, ESA, CSA, STSci/ #JWST NIRCam 470, 356, 182
Paper, 2025-09-10: iopscience.iop.org/article/10.3...
September 10, 2025 at 7:45 PM
A wider sky view of S284
🔭 JWST Program 2317 - Initial mass function in the lowest metallicity protocluster in the Galaxy: www.stsci.edu/jwst-program...
data: SH2-284, released 2023-10-21
NASA, ESA, CSA, STSci/ #JWST NIRCam 470, 356, 182
Paper, 2025-09-10: iopscience.iop.org/article/10.3...
🔭 JWST Program 2317 - Initial mass function in the lowest metallicity protocluster in the Galaxy: www.stsci.edu/jwst-program...
data: SH2-284, released 2023-10-21
NASA, ESA, CSA, STSci/ #JWST NIRCam 470, 356, 182
Paper, 2025-09-10: iopscience.iop.org/article/10.3...
Conclusions:
(1) bulk metallicity of cauliflower is consistent with many extrasolar planets
(2) irradiated[3] cauliflower C/O ratio is consistent with atmospheric measurements
(3) laboratory astrophysics funding should be increased
Thank you! Now to turn this into a TED talk.
[3] In my oven.
(1) bulk metallicity of cauliflower is consistent with many extrasolar planets
(2) irradiated[3] cauliflower C/O ratio is consistent with atmospheric measurements
(3) laboratory astrophysics funding should be increased
Thank you! Now to turn this into a TED talk.
[3] In my oven.
December 1, 2024 at 10:21 PM
Conclusions:
(1) bulk metallicity of cauliflower is consistent with many extrasolar planets
(2) irradiated[3] cauliflower C/O ratio is consistent with atmospheric measurements
(3) laboratory astrophysics funding should be increased
Thank you! Now to turn this into a TED talk.
[3] In my oven.
(1) bulk metallicity of cauliflower is consistent with many extrasolar planets
(2) irradiated[3] cauliflower C/O ratio is consistent with atmospheric measurements
(3) laboratory astrophysics funding should be increased
Thank you! Now to turn this into a TED talk.
[3] In my oven.
Metallicity is generally sorted by the solar primary, Sol is a bit more rich than the average star IIRC
April 10, 2025 at 8:04 PM
Metallicity is generally sorted by the solar primary, Sol is a bit more rich than the average star IIRC
