The James Webb Space Telescope was launched on Christmas Day in 2021 and has been in active service since July of that year.
If it stopped working tomorrow, it will have still changed astronomy and our understanding of our place in the universe forever.
The most intriguing recent development is that astronomers now think that the universe may be much older than we had previously thought and obviously that’s huge. We are still on one tiny outpost and we don’t even know where that is in relation to the rest of the universe. We’re just here, wherever here is.