On Monday, May 5, 2025, at 12:00 c.t., the next meeting of our physics colloquium will take place.
Dr. Christopher Kyba works at the Geographical Institute of the Ruhr University Bochum and at the GFZ Helmholtz Centre for Geosciences. He will give a lecture on the topic "EYES VS. RADIOMETERS - A LIGHT POLLUTION ENIGMA".
Emissions of artificial light into the night environment have been increasing in most countries globally for well over a century. The current rate of change,
however, is not well constrained. Satellite measurements of Earth's radiance at night at the top of atmosphere suggest a global rate increase of about 2% per
year, whereas citizen science observations of star visibility suggest a much larger rate of sky brightness increase of 7-10% per year. This talk will present the
different measurement techniques and their results, and then suggest possible explanations for the discrepancy, and how they might be tested.
Abstract of the presentation by Dr. Kyba.
Prof. Dr. Hendrik Hildebrandt will give an introduction to the lecture.
The faculty cordially invites all interested parties. The event will take place in lecture hall NB 3/99.
All dates of the Physics Colloquium can be found here.
Picture: © Jan Huber on Unsplash