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The Einstein Telescope, set to start working in 2035, is going to be a game-changer in how we detect gravitational waves. These waves are like the universe's version of sound waves, created when really massive things like black holes or neutron stars crash into each other. These collisions not only shake up spacetime but also send out ripples that we can now catch with this fancy new telescope.

Right now, it's still in the planning stages, but the Einstein Telescope is going to use the latest laser tech to pick up these tiny ripples in spacetime caused by gravitational waves. They're planning to build it underground, about 250 meters deep, to shield it from any interference that could mess up their measurements.

One of the big moments that got everyone excited about this project was back in 2017 when they detected both gravitational waves and light signals from two neutron stars smashing together. That was a huge deal because it confirmed a bunch of theories about where elements like gold come from in the universe. This combo of seeing and feeling cosmic events like that is what they call "multi-messenger astronomy.

"It's not a cheap project, though. They're looking at around 1.8 billion euros to build it, plus another 40 million euros a year to keep it running. They're getting help from scientists all over the world to make sure they get it right.They're still figuring out where exactly to put it. Right now, they're eyeing a couple of spots—one in Sardinia, Italy, and another in a spot where Germany, Belgium, and the Netherlands all come together. They've got to pick a place that's stable and won't mess with their readings.

Once it's up and running, the Einstein Telescope won't just be looking for gravitational waves. It'll team up with telescopes that can see everything from radio waves to gamma rays. Together, they'll give us a way better view of stuff like exploding stars and colliding black holes.And it's not just about space stuff. The laser tech they're developing for this could have all kinds of other uses, like in quantum tech or even medical tech.

In the end, the Einstein Telescope is going to be a huge leap forward in understanding the universe. It's like listening to whispers from space and finding out secrets that have been hiding there for billions of years.