The planning and the implementation of the UHU experiment provided several important and useful practical lessons from which future similar mission can benefit. These experiences, learned by the ground science team, have been collected and were presented in two international conferences: the 18th International Conference on Atmospheric Electricity (ICAE) and the 12th VERSIM workshop – […]

The mission phase of the UHU project has officially come to an end. Nearly a year ago, on June 25, 2025, Tibor Kapu and his fellow astronauts embarked on the Axiom Space’s Ax-4 mission to the International Space Station. During the 18-day mission, the crew carried out numerous scientific investigations, including the UHU experiment. As […]

A poster has been presented in the Atmospheric Electricity session of the EGU26 international conference on the great contribution of ground-based citizen observers to the UHU experiment. The poster demonstrates that all conditions were met to observe TLEs from the space and from the ground simultaneously. The only thing that prohibited the fulfillment of this […]

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 […]