An opportunity was created for the ground science team of the UHU experiment to meet Tibor Kapu, the Hungarian astronaut of the Ax-4 mission, and discuss the practical aspect of carrying out nighttime video observations from the International Space Station. The meeting, held on the 14th of January, 2026, was particularly useful as it helped […]

From the game rules:In this game, you become a storm chaser who photographs special light phenomena appearing above lightning-rich thunderstorms.All you need to play this game is a deck of ordinary playing cards. Recommended number of players: 1–6 (yes, you can try it alone, too)Recommended age: 8+Game duration: 15–25 minutes Read the Game Rules for […]

As a gift of the season and as a recognition of all contributors to this procect, 12 images are shared for calendars on the UHU 2025 experiment. The images in this set are intended to be printed in monthly calendars to exhibit imagery obtained in connection with the UHU Earth observation experiment in 2025, part […]

Another type of transient luminous event (TLE) has been identified within the observational material of the UHU experiment. The pixie, also known as a blue emission, or simply ‘blue’, is a short-lived variant of corona discharges. These flashes typically form at or near the top of an active thundercloud. Although their name originates from early […]

Hints on how to start photographing TLEs, compiled by Christophe Suarez, are now linked in the page that intends to help photographers recently become interersted in capturing these events. The document is available in English, Spanish, and French.

New observation data are becoming available from the UHU experiment, recorded by the crew of Axiom Space’s Ax-4 mission aboard the International Space Station between June 27 and July 13. Our team continues conducting quality checks and reviewing of the video recordings, searching for TLE (Transient Luminous Events). During the mission, we provided 8–12 potential […]

The observation campaign related to the project ended on 31 July. The collection of observations is still ongoing, similarly to the evaluation of observations made from space, some of which we still do not have access to. Thank you for the images you have sent and shared so far! We are still waiting for the […]

During preliminary quality checks of the videos recorded during Axiom Space’s Ax-4 mission in the framework of the UHU Earth Observation experiment, we identified two distant ELVES (ring-shaped transient luminous event), captured by Ax-4 mission commander Peggy Whitson on July 4 while flying over the Philippines and Eastern Indonesia. These are the first lightning-related optical […]

The Ax-4 crew has left the ISS on 14 July so the mission to observe TLEs from up there has come to an end. Evaluation of the observations is underway. Nevertheless, the ground campaign to observe TLEs continues until the end of July, so we encourage you to keep an eye on the lightning activity […]

A few UHU project-related observations have already been made by the Ax-4 crew from the ISS. So far, we could access only a fraction of the recorded observation material. Basically, this allowed only qucik quality checking of the videos. Lightning has been surely recorded from space by the AX-4 crew. Detailed search for TLEs is […]