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Christopher Kyba Profile picture
Christopher Kyba
@skyglowberlin
Public Scientist. Light pollution researcher at @GFZ_Potsdam (tweeting personal opinions). Follow me for cool nighttime photos, from ground, air, and space!
Jan 19, 2023 • 50 tweets • 24 min read
Have LED lights reduced #LightPollution, or have things gotten worse because of blue light emissions? We have the answer, and it's not good news...

🧵 below, full methodology and results new in @sciencemagazine: science.org/doi/10.1126/sc… #ScienceResearch
(1/) Before I tell you what we did, I want you to understand why this is important. Skyglow is a visible symbol of our failure to transition to a sustainable society.

In addition, if skyglow is growing, then all of the ecological impacts of #LightPollution are probably too. (2/) Image showing sky brightness 60 km South of Berlin (left) an
Oct 29, 2020 • 46 tweets • 15 min read
We’ve just published the coolest experiment I’ve done in years: doi.org/10.1177/147715…

Want to know why the brightness of this city is different in these two satellite images? Read the thread 👇🏾 First some background: I study artificial light in the outdoor environment. I'm interested in where it comes from, where it goes, what impact it has, and what we can do about #LightPollution.
Jun 9, 2020 • 22 tweets • 9 min read
Jacqueline Coesfeld has developed a method to correct monthly Day/Night Band data from @eogatpayne to center areas with no light at zero. Link to the paper: mdpi.com/1424-8220/20/1…

Image shows the result for a random location in the Pacific Ocean. Thread 👇🏿 Before correctionAfter correction There's a problem with viewing the Earth at night from space: the surface of the Earth is never actually "dark". Space based sensors view the Earth's through a glowing atmosphere. (Image iss061e110462.jpg)