Reposted
(announcement 1 of 2)
everyone, say hello to ...
HIP 54515 b: the 3rd planet jointly discovered from direct imaging and astrometry arxiv.org/abs/2512.02159
[Currie & Li et al. 2025, AJ in press]
Press releases to follow tomorrow
everyone, say hello to ...
HIP 54515 b: the 3rd planet jointly discovered from direct imaging and astrometry arxiv.org/abs/2512.02159
[Currie & Li et al. 2025, AJ in press]
Press releases to follow tomorrow
December 3, 2025 at 2:55 AM
(announcement 1 of 2)
everyone, say hello to ...
HIP 54515 b: the 3rd planet jointly discovered from direct imaging and astrometry arxiv.org/abs/2512.02159
[Currie & Li et al. 2025, AJ in press]
Press releases to follow tomorrow
everyone, say hello to ...
HIP 54515 b: the 3rd planet jointly discovered from direct imaging and astrometry arxiv.org/abs/2512.02159
[Currie & Li et al. 2025, AJ in press]
Press releases to follow tomorrow
Reposted
Fela Kuti was born on October 15, 1938 #Afrobeat #Felabration
October 15, 2025 at 6:33 AM
Fela Kuti was born on October 15, 1938 #Afrobeat #Felabration
Reposted
Welcome, Plato! 🤗
On 1 September, the spacecraft arrived in the Netherlands by boat from Germany via the Rhine River.
In the coming weeks, engineers will add the sunshield & solar arrays and carry out tests to confirm Plato is ready for launch 🚀
www.esa.int/Science_Expl...
🔭 #Exoplanets
On 1 September, the spacecraft arrived in the Netherlands by boat from Germany via the Rhine River.
In the coming weeks, engineers will add the sunshield & solar arrays and carry out tests to confirm Plato is ready for launch 🚀
www.esa.int/Science_Expl...
🔭 #Exoplanets
September 11, 2025 at 12:10 PM
Welcome, Plato! 🤗
On 1 September, the spacecraft arrived in the Netherlands by boat from Germany via the Rhine River.
In the coming weeks, engineers will add the sunshield & solar arrays and carry out tests to confirm Plato is ready for launch 🚀
www.esa.int/Science_Expl...
🔭 #Exoplanets
On 1 September, the spacecraft arrived in the Netherlands by boat from Germany via the Rhine River.
In the coming weeks, engineers will add the sunshield & solar arrays and carry out tests to confirm Plato is ready for launch 🚀
www.esa.int/Science_Expl...
🔭 #Exoplanets
Reposted
New in library. The chiarascuro full page portraits are iconic (see what I did 🙄) high Renaissance art. Goltzius 1557, German ed. bound in illuminated manuscript. Some empty roundels charmingly filled out with primitive portraits, notes or diagrams. Several hundred medallions with bios. Folio.
September 9, 2025 at 5:02 PM
New in library. The chiarascuro full page portraits are iconic (see what I did 🙄) high Renaissance art. Goltzius 1557, German ed. bound in illuminated manuscript. Some empty roundels charmingly filled out with primitive portraits, notes or diagrams. Several hundred medallions with bios. Folio.
Reposted
Two papers announcing the discovery of a directly imaged 6 Jupiter mass planet around binary system HD 143811 AB Squicciarini+ and Jones+ in Sco-Cen - Keck, Gemini and VLT all imaging this companion and confirmed with several years of common proper motion. #astrodon #exoplanet #exosci
September 9, 2025 at 9:29 AM
Two papers announcing the discovery of a directly imaged 6 Jupiter mass planet around binary system HD 143811 AB Squicciarini+ and Jones+ in Sco-Cen - Keck, Gemini and VLT all imaging this companion and confirmed with several years of common proper motion. #astrodon #exoplanet #exosci
Reposted
Dwarf planet #Quaoar with its moon #Weywot (small white point right side). The system orbits the sun in the #KuiperBelt beyond planet Neptune. Quaoar has rings (not seen here). 🪐🌕 🔭 #planetsci #dwarfplanet
My image with #JWST, processed today: commons.wikimedia.org/wiki/File:Qu...
My image with #JWST, processed today: commons.wikimedia.org/wiki/File:Qu...
August 18, 2025 at 8:04 AM
Dwarf planet #Quaoar with its moon #Weywot (small white point right side). The system orbits the sun in the #KuiperBelt beyond planet Neptune. Quaoar has rings (not seen here). 🪐🌕 🔭 #planetsci #dwarfplanet
My image with #JWST, processed today: commons.wikimedia.org/wiki/File:Qu...
My image with #JWST, processed today: commons.wikimedia.org/wiki/File:Qu...
Reposted
Proud supervisor moment: #LeidenObservatory graduate student Richelle van Capelleveen led one of two papers on our discovery of WISPIT 2b, a 5 Jupiter mass exoplanet clearing a path in a circumstellar disk. Laird Close and his team saw it in H-alpha, indicating gas accretion #astrodon 🔭 🧪
August 26, 2025 at 11:51 AM
Proud supervisor moment: #LeidenObservatory graduate student Richelle van Capelleveen led one of two papers on our discovery of WISPIT 2b, a 5 Jupiter mass exoplanet clearing a path in a circumstellar disk. Laird Close and his team saw it in H-alpha, indicating gas accretion #astrodon 🔭 🧪
Reposted
“A peaceful place, or so it looks from space…”
New image of the home world and our companion moon, captured last month from 180 million miles out by our Psyche spacecraft on its way toward the first rendezvous with a metallic asteroid in 2029.
🧪
www.nasa.gov/missions/psy...
New image of the home world and our companion moon, captured last month from 180 million miles out by our Psyche spacecraft on its way toward the first rendezvous with a metallic asteroid in 2029.
🧪
www.nasa.gov/missions/psy...
August 19, 2025 at 7:18 PM
“A peaceful place, or so it looks from space…”
New image of the home world and our companion moon, captured last month from 180 million miles out by our Psyche spacecraft on its way toward the first rendezvous with a metallic asteroid in 2029.
🧪
www.nasa.gov/missions/psy...
New image of the home world and our companion moon, captured last month from 180 million miles out by our Psyche spacecraft on its way toward the first rendezvous with a metallic asteroid in 2029.
🧪
www.nasa.gov/missions/psy...
Reposted
The TRAPPIST-1 d exoplanet may be Earth-sized 🌍 but it has no Earth-like atmosphere.
Webb’s #NIRSpec has found no traces of molecules that are common in Earth’s atmosphere.
Read more 👉 www.esa.int/Science_Expl... 🔭 🧪
Webb’s #NIRSpec has found no traces of molecules that are common in Earth’s atmosphere.
Read more 👉 www.esa.int/Science_Expl... 🔭 🧪
August 13, 2025 at 2:10 PM
The TRAPPIST-1 d exoplanet may be Earth-sized 🌍 but it has no Earth-like atmosphere.
Webb’s #NIRSpec has found no traces of molecules that are common in Earth’s atmosphere.
Read more 👉 www.esa.int/Science_Expl... 🔭 🧪
Webb’s #NIRSpec has found no traces of molecules that are common in Earth’s atmosphere.
Read more 👉 www.esa.int/Science_Expl... 🔭 🧪
Reposted
We computed planet occurrence rates separately for super-Earth and sub-Neptune #exoplanets for host stars between 3200 K and 6900 K. The sub-Neptunes peak around 3750 K and drop toward cooler stars! However, the super-Earths do not drop off!
5/9
5/9
August 11, 2025 at 1:01 AM
We computed planet occurrence rates separately for super-Earth and sub-Neptune #exoplanets for host stars between 3200 K and 6900 K. The sub-Neptunes peak around 3750 K and drop toward cooler stars! However, the super-Earths do not drop off!
5/9
5/9
Reposted
Kepler mission: smaller stars have more short-period, small #exoplanets.
Theory: the smallest stars won’t have enough disk material to make small planets so there must be a turnover.
Kepler+K2: We have found a turnover!
Check out our newest Scaling K2 paper: arxiv.org/abs/2508.05734
🧵 1/9
🔭🧪☄️
Theory: the smallest stars won’t have enough disk material to make small planets so there must be a turnover.
Kepler+K2: We have found a turnover!
Check out our newest Scaling K2 paper: arxiv.org/abs/2508.05734
🧵 1/9
🔭🧪☄️
Scaling K2 VIII: Short-Period Sub-Neptune Occurrence Rates Peak Around Early-Type M Dwarfs
We uniformly combined data from the NASA Kepler and K2 missions to compute planet occurrence rates across the entire FGK and M dwarf stellar range. The K2 mission, driven by targets selected by guest ...
arxiv.org
August 11, 2025 at 1:01 AM
Kepler mission: smaller stars have more short-period, small #exoplanets.
Theory: the smallest stars won’t have enough disk material to make small planets so there must be a turnover.
Kepler+K2: We have found a turnover!
Check out our newest Scaling K2 paper: arxiv.org/abs/2508.05734
🧵 1/9
🔭🧪☄️
Theory: the smallest stars won’t have enough disk material to make small planets so there must be a turnover.
Kepler+K2: We have found a turnover!
Check out our newest Scaling K2 paper: arxiv.org/abs/2508.05734
🧵 1/9
🔭🧪☄️
Reposted
Time for the promised thread on ε Eridani b!
I should emphasize this manuscript is a submitted draft—comments from the community are very welcome.
Bottom line: ε Eri b is likely a 1.0 Jupiter-mass planet, only 3.2pc away, on a 3.55 AU near-circular orbit, ~aligned with its debris disk. 🔭🪐🧪 [1/7]
I should emphasize this manuscript is a submitted draft—comments from the community are very welcome.
Bottom line: ε Eri b is likely a 1.0 Jupiter-mass planet, only 3.2pc away, on a 3.55 AU near-circular orbit, ~aligned with its debris disk. 🔭🪐🧪 [1/7]
March 3, 2025 at 6:51 PM
Time for the promised thread on ε Eridani b!
I should emphasize this manuscript is a submitted draft—comments from the community are very welcome.
Bottom line: ε Eri b is likely a 1.0 Jupiter-mass planet, only 3.2pc away, on a 3.55 AU near-circular orbit, ~aligned with its debris disk. 🔭🪐🧪 [1/7]
I should emphasize this manuscript is a submitted draft—comments from the community are very welcome.
Bottom line: ε Eri b is likely a 1.0 Jupiter-mass planet, only 3.2pc away, on a 3.55 AU near-circular orbit, ~aligned with its debris disk. 🔭🪐🧪 [1/7]
Reposted
A timely paper for #HWO25: is it enough to find Earth-like planets around other nearby stars? No! We need their planetary system contexts. Does life on Earth depend on Jupiter?
@sabinastro.bsky.social led this nice analysis of HWO requirements to detect Earths + Jupiters.
arxiv.org/abs/2507.21443
@sabinastro.bsky.social led this nice analysis of HWO requirements to detect Earths + Jupiters.
arxiv.org/abs/2507.21443
Requirements for Joint Orbital Characterization of Cold Giants and Habitable Worlds with Habitable Worlds Observatory
We determine optimal requirements for the joint detection of habitable-zone planets and cold giant planets with the Habitable Worlds Observatory (HWO). Analysis of 164 nearby stars shows that a corona...
arxiv.org
July 30, 2025 at 6:26 PM
A timely paper for #HWO25: is it enough to find Earth-like planets around other nearby stars? No! We need their planetary system contexts. Does life on Earth depend on Jupiter?
@sabinastro.bsky.social led this nice analysis of HWO requirements to detect Earths + Jupiters.
arxiv.org/abs/2507.21443
@sabinastro.bsky.social led this nice analysis of HWO requirements to detect Earths + Jupiters.
arxiv.org/abs/2507.21443
Reposted
This is a photo of an exoplanet from JWST.
A photo.
Of a planet orbiting a star 60 lightyears away.
A real world, 568 trillion kilometres away.
A photo.
Of a planet orbiting a star 60 lightyears away.
A real world, 568 trillion kilometres away.
June 10, 2025 at 8:28 PM
This is a photo of an exoplanet from JWST.
A photo.
Of a planet orbiting a star 60 lightyears away.
A real world, 568 trillion kilometres away.
A photo.
Of a planet orbiting a star 60 lightyears away.
A real world, 568 trillion kilometres away.
Reposted
The potential discovery of alien life is so enticing that it drags even reputable outlets into running naive or outright misleading stories. Here we go again with planet K2-18b.
Um....there's strong evidence of non-biological sources of the molecule DMS. 🧪🔭
Um....there's strong evidence of non-biological sources of the molecule DMS. 🧪🔭
April 17, 2025 at 4:22 AM
The potential discovery of alien life is so enticing that it drags even reputable outlets into running naive or outright misleading stories. Here we go again with planet K2-18b.
Um....there's strong evidence of non-biological sources of the molecule DMS. 🧪🔭
Um....there's strong evidence of non-biological sources of the molecule DMS. 🧪🔭