Andreas Freise
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gwoptics.bsky.social
Andreas Freise
@gwoptics.bsky.social
250 followers 210 following 720 posts
Looking for gravitational waves, modelling light.

Photos are taken by me unless stated otherwise (provided under a CC BY-NC-SA 4.0 license).
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gwoptics.bsky.social
Postcard service.

The Einstein Telescope annual meeting last week came with a novel service: write a message on one of the provided postcards and they would send it for you. What a great idea! Now waiting to see how many will arrive...

#photography #einsteintelescope #science
A photo of a set of illustrated postcards featuring gravitational waves themes, maps of Croatia, event details, and figures set against blue, black, and white graphics.
November 20, 2025 at 9:52 AM
gwoptics.bsky.social
Four.

#FotoVorschlag: Zahlen: vier

#photography #randomnumber #iceland
Photo of a side of a house with one part red corrugated metal and another part black. A rusty “4,” hangs over a white door frame.
November 19, 2025 at 3:46 PM
gwoptics.bsky.social
In greyscale.

#photography #meermittwoch #croatia
A black and white photo looking down into a coastal marina with calm water. Two small boats coming in from the distance, leaving faint wakes. The horizon is barely visible between the sea and the clody sky.
November 19, 2025 at 9:00 AM
gwoptics.bsky.social
Spinning and weaving.

#photography #abstract
An abstract photo showing vertical and horizontal streaks on a car window and mirror surfaces lit by yellow and red light, with small bright spots and a larger white glare near the bottom.
November 18, 2025 at 4:27 PM
gwoptics.bsky.social
By bike.

This is just around the corner from where I work. I cycled by, and then turned around to catch this grainy shadow and reflection.

#photography #texturetuesday #bicycle
Upside down photo showing a sun lit wall and its reflection in a canal. There is a shadow of a rider on a bicycle on the wall and in the reflection. Hanging plants and ripples of water appear at the top of the image.
November 18, 2025 at 7:13 AM
gwoptics.bsky.social
Waiting for the bus to take us back.

#photography #blackandwhite
A nighttime photo looking across a street showing a row of people standing on a sidewalk along a stone wall illuminated by a tall streetlamp with multiple bright lights.
November 17, 2025 at 5:02 PM
gwoptics.bsky.social
All gates.

#photography #travel
A photo showing a hallway with two rows of metal seats leading to a bright window showing an airport sign that reads “Svi izlazi / All gates” with an arrow pointing right.
November 17, 2025 at 8:01 AM
gwoptics.bsky.social
A sky from another age.

#photography #romans
An evening photo of an old stone wall with rectangular and arched openings that belongs to a ruin of an amphitheater. A sunset sky with a soft gradient can be seen through the openings in the wall.
November 16, 2025 at 3:36 PM
gwoptics.bsky.social
The streets are quiet.

#photography #silentsunday
A photo showing a deserted sidewalk lined with autumn leaves beside a ribbed yellow building, with a bicycle parked at the wall. An empty street, trees and an apartment tower can be seen in the background.
November 16, 2025 at 8:17 AM
gwoptics.bsky.social
Oblivious.

#photography #caturday
A photograph showing a wooden table top with three used plates with small forks next to a small black-and-white LEGO-style cat cleaning itself.
November 15, 2025 at 3:40 PM
Reposted by Andreas Freise
ftlshawn.bsky.social
Diver At International Swimming Hall Of Fame.
November 14, 2025 at 2:13 PM
Reposted by Andreas Freise
matthiaskie.bsky.social
synthetic sky #foggy #night #graz q
couple walking across an empty tram and bus station in a foggy night, many streetlights illuminating the scene from far above
November 14, 2025 at 10:11 PM
gwoptics.bsky.social
A misty ride home.

#FotoVorschlag 'Verloren im Dunst'

#photography #mist
A photo of a misty street at night with streetlights and traffic lights glowing and a person cycling in the distance.
November 15, 2025 at 8:15 AM
gwoptics.bsky.social
Behind the scenes at the Einstein Telescope Annual Meeting in Opatija.

#photography #croatia #EinsteinTelescope
A behind-the-scenes photo of a large science meeting, showing a stage setup with a projector facing a large screen, showing a presentation to an auditorium with red seats and a few people mingling in the background.
November 14, 2025 at 4:21 PM
gwoptics.bsky.social
Symbol overload?

#photography #fensterfreitag
A close up photo of a stone building façade featuring an ornate sculpted head crowned by a small sphinx like creature above an arched window. The window is frosted glass with a stylized eagle.
November 14, 2025 at 10:18 AM
gwoptics.bsky.social
A quick game of chess?

#photography #chess
A photo of a 4x4 black and white checker pattern painted on asphalt, with a pair of brown shoes with orange laces visible at the bottom edge.
November 13, 2025 at 1:51 PM
gwoptics.bsky.social
Under ground.

As part of my work I need to learn a tiny bit about constructing large tunnels. This led to a visit to a tunnel boring machine in operation. Here the look out of the rear window.

#photography #tunnel #ToInfinity
A photo looking into a large concrete tunnel extending into the distance, lined with pipes on one side and a yellow ventilation duct along the ceiling.
November 12, 2025 at 5:38 PM
gwoptics.bsky.social
Undecided.

#photography #abstract
A photo showing a white and grey plastered wall with multiple intersecting cracks running across its surface. The lower right of the wall is grey, the upper left white, the border between the two colours lying diagonally across the image.
November 12, 2025 at 8:09 AM
gwoptics.bsky.social
Invasion by the green fabric confusion.

#photography #abstract
A close up photo of a textured green-brown carpet with thick fibers that lies over a dark gray felt-like surface, forming a diagonal divide.
November 11, 2025 at 4:01 PM
gwoptics.bsky.social
Patterns on the ground.

#photography #blackandwhite
A photo of shadows of tree branches falling across a tiled pavement with two small circular drains set among square stones.
November 11, 2025 at 9:14 AM
Reposted by Andreas Freise
miraalba.bsky.social
"Quartett"
#FotoVorschlag
…zur Sicherheit!
Hochformat. Vier rote Feuerlöscher in einem langweilig beigen Gang eines einfachen Hotels.
November 9, 2025 at 2:59 PM
gwoptics.bsky.social
Zero colour.

#photography #abstract
A photo taken while looking up, showing a rectangular ceiling light with a central slit glowing among exposed pipes, beams, and metal grates, all in a matt light gray colour.
November 10, 2025 at 4:49 PM
gwoptics.bsky.social
Looks like someone has blown a fuse already.

#photography #monday #fuse
A black and white photo showing an electric fuse lying on the floor beneath metal chairs on a tiled floor.
November 10, 2025 at 8:02 AM
gwoptics.bsky.social
Semi permant four.

#fotovorschlag 'quartett'

#photography #streetart
A photo showing street art under a bridge: a large paper shows figures in hoodies riding a rocket-shaped pen labeled “KAMP SEEDORF” and “semi permanent”. A person is jogging past on the road below.
November 9, 2025 at 7:12 PM
gwoptics.bsky.social
What next?

#photography #silentsunday
A photo looking down on a white mug with coffee residue, sitting on a wooden table and casting a long shadow that falls across a newspaper page.
November 9, 2025 at 10:37 AM