''That's why he's the goat''-Meme YouTube video by Memeverse

www.youtube.com/watch?v=VtAz...

SO PROUD OF MY (FUTURE*) WIFE @sierragrant.bsky.social

*FUTURE MEANING SUNDAY

#exoplanets

🪐🔭 JWST is letting us learn about disks around PLANETARY-MASS OBJECTS!!!

Now published in AJ! Get in here this system is crazy iopscience.iop.org/article/10.3...

Another MINDS JWST paper! We explore the stark transition from H2O-dominated spectra in Sun-like systems to the carbon-rich chemistry seen for low-mass objects. We don't know exactly what is driving this trend, but we explore the possibilities that may be acting in concert.
arxiv.org/pdf/2508.04692

Congratulations to Dr. Allison McCarthy, who successfully defended her PhD “The Physical Basis for L and T Dwarf Variability” on Friday! Allie is now off to Trinity College Dublin for a postdoc with the ExoAimsir group led by Prof. Johanna Vos! 🪐🔭 @alliemccarthy.bsky.social @johannavos.bsky.social

A light curve showing a transit of HIP 41378 f. The data span three nights and were taken with multiple facilities. On the second night, the data from four different facilities are decremented by approximately the transit depth expected for HIP 41378 f.

New paper on arxiv! My colleague Juliana García-Mejía analyzed data from several facilities searching for a transit of the long-period (542 d) super puff HIP 41378 f. The full transit is 19 hours long, but we detected it using a few "snapshots" from multiple observatories.

arxiv.org/abs/2506.20907

And here's the 40-degree spherical harmonic expansion of my cat 😭😭😭

Just found out starry (starry.readthedocs.io/en/v1.1.0/) lets you project any image you want onto a sphere, so here's the 40-degree spherical harmonic expansion of Jupiter. 🪐🔭

Agreed! And I think it will be very informative to watch how the spot(s) evolve over the coming years

Thank you Johanna! :)

This work has been submitted to AJ and we welcome any comments! #exoplanets ⭐🪐🔭

We simultaneously modeled several transit observations, finding that the rotational light curve AND the changes in the transit shapes can be described by a planet transiting a large polar spot.

A light curve of TOI-3884 b showing its 11-day rotation period.

We used 124 nights from the Tierras Observatory (sites.harvard.edu/tierras-obse...) to measure the star's rotation period, which is 11 days.

TOI-3884 b is a planet around an M dwarf whose transits show persistent spot crossings. We show that the star's rotational and spot-crossing variations can be modeled with a misaligned planet transiting a large polar spot (confirming last week's results from Mori et al.)
arxiv.org/abs/2506.11998

Thank you Brett!

Now published in AJ! We used Tierras to measure the 23-day rotation period of a K dwarf and found that the orbit of its transiting planet is aligned with the star's spin axis. Stay tuned as we measure true obliquities for a larger sample!

iopscience.iop.org/article/10.3...

The Tierras Observatory i̶s̶ ̶ was supported by the National Science Foundation under Award No. AST-2308043.

arxiv.org/abs/2505.03628 🪐🔭

Hi everyone, I'm looking to hire a postdoc this upcoming year, so if you're interested in coming to San Diego to work on low-mass stars, brown dwarfs, and exoplanets, please apply!
aas.org/jobregister/...

🚨🚨 I'm hiring!!! 🚨🚨

Postdoc and PhD positions available to join my ERC project Exo-PEA at @tcddublin.bsky.social. The project aims to understand weather in giant extrasolar worlds ☁️⚡🪐

📆 Deadline: Jan 6th

Postdoc ad: tinyurl.com/2ufcwvxf
PhD ad: tinyurl.com/5amcea6p

Please share widely! 🔭🪐

The JWST Weather Report from the Isolated Exoplanet Analog SIMP 0136+0933: Pressure-Dependent Variability Driven by Multiple Mechanisms Isolated planetary-mass objects share their mass range with planets but do not orbit a star. They lack the necessary mass to support fusion in their cores and thermally radiate their heat from formati...

Check out BU PhD-student @alliemccarthy.bsky.social's paper just accepted to ApJL! JWST spectral light curves of SIMP 0136 show clear pressure-dependence, indicating three variability mechanisms: clouds, hot spots and C chemistry. @johannavos.bsky.social is the JWST PI! arxiv.org/abs/2411.16577

Meteor caught on Whipple Observatory sky cameras last night 🪐🔭

Recently implemented Sicko Mode™ on Tierras 🔭🪐

Comet C/2023A3 as seen by the Tierras Observatory! 🪐🔭

Woooo congrats Erik!!!

🔭🪐

A telescope dome with a GIANT SPIDER seemingly in the dome slit (thankfully just on our webcam).

opened up the telescope and almost had a heart attack