Leora Radetsky
LightNews LightNews
lradetsky.bsky.social
Leora Radetsky
@lradetsky.bsky.social
440 followers 2.1K following 120 posts
Lighting scientist. Decarbonization, energy efficiency, light pollution mitigation, integrative lighting. Opinions are my own.

https://www.researchgate.net/profile/Leora-Radetsky
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lradetsky.bsky.social
What perfect album came out the year I turned 16 you ask?
Artist: Tracy Chapman Album: Tracy Chapman Released April 5, 1988
November 17, 2025 at 4:43 AM
lradetsky.bsky.social
Aurora borealis during a sub storm with green and pink pillars above a reservoir in upstate New York. The full moon washes out most of the color in the sky.
November 7, 2025 at 3:25 AM
lradetsky.bsky.social
This is Truffle - aka Dr Evil. She likes to take down spice racks at 5 am.
A black-and-white cat stands on a small wooden table, leaning toward a partially open white door and biting the edge of it. The cat’s eyes are wide and curious, and its tail is raised. Behind the cat, various items and cords are visible
August 9, 2025 at 2:16 AM
lradetsky.bsky.social
Fireflies flash to each other in a timeless mating dance. The hot weather has finally arrived and it’s so nice to see our magical friends appear in the dark.
Firefly movement dots Sumac trees and black raspberry shrubs. Upstate NY at 11 PM. ProCam 8 app, 300 second light trail photo.
June 21, 2025 at 3:26 AM
lradetsky.bsky.social
Poster for the HBO series Carnivàle. At the top, the show’s title “CARNIVÀLE” appears inside a rustic sign featuring a crescent moon and star. Below it reads, “Into each generation is born a creature of light and a creature of darkness.” The main cast poses in front of an old truck, with a broken Ferris wheel in the background, set against a dusty, ominous landscape. Characters are dressed in 1930s Dust Bowl-era clothing, some standing, sitting, or leaning on the vehicle. At the bottom, text announces the premiere date: “September 14, 9:30PM” and “New episodes Sundays at 9PM,” with the HBO logo.
April 28, 2025 at 2:37 AM
lradetsky.bsky.social
Happy Earth Day. Let’s take better care of her 🌎 and ourselves

landsat.gsfc.nasa.gov/apps/YourNam...
My name, LEORA, in Land satellite imagery
April 22, 2025 at 9:06 PM
lradetsky.bsky.social
Why hello Ms. Aurora. Sure was nice to see you again in the ADK
Empty road in Gabriels NY under a clear night sky looking North. Above a mountainous ridge is a low lying green Aurora Arc and some green and purple pillars above. Same empty road under a clear night sky. Multiple thin green Aurora arcs are visible with green fence-post pillars within.
March 9, 2025 at 9:48 PM
lradetsky.bsky.social
An old-fashioned brass menorah with 8 illuminated blue candles covered with polka dots.
January 2, 2025 at 3:38 AM
lradetsky.bsky.social
This little goofball does the exact same thing ALL NIGHT LONG, especially when there is snow on the ground.
Goofy, elderly bichon frise, with his tongue sticking out. He is looking straight at the camera.
December 8, 2024 at 12:37 AM
lradetsky.bsky.social
@remiboucher.bsky.social will I see this at Mont Megantic? 😂
XKCD comic on light pollution. A cartoon titled “Light Pollution and the Disappearing Night Sky” shows four panels illustrating the effects of light pollution. 1. High Light Pollution (Cities): The sky appears brownish and only a few stars are visible. 2. Moderate Light Pollution (Suburbs): The sky is darker, revealing more stars, but it is still somewhat hazy. 3. Low Light Pollution (Very Remote Areas): The sky is very dark, showing a multitude of stars and faint details of the Milky Way. 4. No Light Pollution (How the Sky Should Look): An exaggerated depiction of the night sky shows an intricate, fantastical scene with structures labeled “Lattice of the Crystal Spheres” and “Ships of the Sky King.” The cartoon humorously suggests that an unpolluted night sky might reveal imaginary cosmic structures.
November 22, 2024 at 3:56 AM
lradetsky.bsky.social
November 10, 2024 at 1:48 AM
lradetsky.bsky.social
Troy NY’s Troy Glow Light Art Festival brought out huge crowds in November. Troy is a good example of a city that is not overlit.
November 10, 2024 at 1:48 AM
lradetsky.bsky.social
Thank you for advocating for fireflies and other bugs.
November 8, 2024 at 10:59 PM
lradetsky.bsky.social
November 6, 2024 at 4:37 AM
lradetsky.bsky.social
November 5, 2024 at 1:45 PM
lradetsky.bsky.social
I’ll jump in to help. Meet Cloud
Little white Bicon Frise sitting in a car looking adorable.
October 25, 2024 at 10:21 PM
lradetsky.bsky.social
COMET SIGHTING: Comet Tsuchinshan-Atlas (A3) in the sky this evening at 7:25 PM in downtown Castleton NY (lots of light pollution though, Bortle Sky 5)
October 20, 2024 at 11:59 PM
lradetsky.bsky.social
October 13, 2024 at 1:50 AM
lradetsky.bsky.social
Share your Aurora photos at 10:10 on 10/10. Here are mine #northernlights #darkskies #auroraborealis
October 12, 2024 at 9:33 PM
lradetsky.bsky.social
Aurora in upstate NY tonight-getting out of Albany allowed for pink and green to be seen across the entire sky. #northernlights
October 11, 2024 at 5:37 AM
lradetsky.bsky.social
I love this mineral. We have it too.
Rhodochrosite from Colorado
September 28, 2024 at 2:59 AM
lradetsky.bsky.social
Incredible saturated amber and pink sunset flight from Chicago to Upstate NY
September 26, 2024 at 2:52 AM
lradetsky.bsky.social
September 20, 2024 at 3:42 AM
lradetsky.bsky.social
My spoiled older dogs like to take in the sights in their stroller
September 20, 2024 at 3:41 AM
lradetsky.bsky.social
Meet Aspen (left) and Cloud
September 20, 2024 at 3:36 AM