Joe O'Rourke

@geojgo.bsky.social

Associate Professor in the School of Earth and Space Exploration at Arizona State University. Barnes & Noble Premium Member.

ASU is eager to host more 51 Pegasi b Postdoctoral Fellows. (We've had 4 in the past 3 years.) People focused on the Solar System (i.e., not exoplanets) are VERY ALLOWED. Happy to chat with anyone about this opportunity 🥳 www.hsfoundation.org/programs/sci...

51 Pegasi b Fellowship

The 51 Pegasi b Fellowship provides exceptional postdoctoral scientists with the opportunity to conduct theoretical, observational, and experimental research in planetary astronomy.

hsfoundation.org

Hello! We have a very-off-cycle postdoc fellowship at UC Santa Cruz. Open to any area of Astronomy and Astrophysics. Applications are due July 15th. It is funded by the Moore Foundation. Looking for someone to start Oct 1, 2026 (!, approx), see details below. aas.org/jobregister/...

Postdoctoral Fellow in Astronomy & Astrophysics, UC Santa Cruz | American Astronomical Society

The Department of Astronomy and Astrophysics invites applications for a two-year Postdoctoral Fellowship position at the University of California, Santa Cruz, funded by the Moore Foundation. The searc...

aas.org

Rachel Maxwell—Io doesn’t have a dynamo, but could Io have remnant crustal magnetism? Maybe! Lava flows on Io may freeze in the magnetic field from Jupiter. A low flying spacecraft with a magnetometer might be able to see this. (Io Workshop 2026)

A photograph of a sketch in my notebook from the Io science workshop, showing a summary of a talk by Rachel Maxwell about how I might freeze in magnetic anomalies from Jupiter’s magnetic field. The sketch shows Jupiter in the background with an enormous magnetic field, shown as green and blue magnetic field lines at emanate from the north and south pole of Jupiter. I was in the foreground and is covered in lava flows. i’ve drawn in hypothetical little magnetic anomalies with their own blue and pink magnetic field lines emanating from the surface of Io, along with a small spacecraft that’s flying low near Io that could measure these magnetic anomalies. There are some text boxes near the sketch that note of variety of things, including that the magnetic field strength at Io from Jupiter is about 1.8 micro-tesla, and that large magnet anomalies greater than 50 km in size could be detectable from a 200 km altitude. Magnetite is likely the carrier of thermal remanence.