How does the solar wind composition influence a comet magnetosphere? The magnetosphere expands when the alpha particle fraction increases. Anja Möslinger and others showed that this is because protons are better than alphas at keeping it small @aanda-journal.bsky.social.
doi.org/10.1051/0004...

Traditionally, PhD theses are nailed to a wall at the university library 3 weeks before the dissertation. Here's Sara Nesbit-Östman's PhD thesis about the bow shock of Mars, attached to the wall at @umeauniversitet.bsky.social, using an unusually long nail.

We wanted to find out how important magnetosheath jets really are. And in a new paper by Eva Krämer at Umeå University it is shown that jets carry about half of the kinetic energy in the quasiparallel magnetosheath of Earth.
doi.org/10.1029/2025...

Three PhD student positions in Space Physics are available at Umeå University in Sweden @umeauniversitet.bsky.social. Apply 23 May 2025 at the latest. For more information see www.umu.se/en/work-with...

Jets were recently found at Mars, and we made a statistical study, using data from the Maven spacecraft, to find out more about them. You may read the paper here: doi.org/10.1051/0004...

We wanted to know what makes the Martian bow shock asymmetric. We found that at any one instant it can be quite asymmetric, but on average these asymmetries cancel out to a large extent. The bow shock is actually quite dynamic. Read the new paper by Sara Nesbit-Östman et al.
doi.org/10.1051/0004...

There's a new review paper about the Magnetosheath Jets, and other jets, out now by Eva Krämer and others.
doi.org/10.1007/s112...

Last day before the holiday break and it's time to complete that paper.

Are waves heating the plasma at Venus? Gabriella Stenberg Wieser used data from the Venus Express spacecraft to find out. The energy density of the waves is high enough that they could cause the observed heating. The study was published in JGR Space Physics: doi.org/10.1029/2024...

Hello Bluesky!