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And it was the first telescope. It was made in 1608 by a Dutch eyeglass maker Hans Zippershey. In fact, it was the first refractor telescope and that's fine. And we've nailed our fort of the plans for this and improved on it. And the first telescope that was what led to the revolutionizing our understanding of the universe. His telescope, it just used a simple lens and all that random things magnified objects to about 80 degrees to the other side. And later on, of course, I built on that concept and we were able to build much more powerful telescopes than that. And some telescopes are more powerful than others. Even those people have their own magnetic scopes. And the most powerful ones are allowing researchers to study things like black holes and ice-dying rings and even some of the furthest regions of space. So, what's the most powerful telescope and how far can it take? And the most powerful telescope presently is the James Webb Space Telescope, the JWST. And that was launched in 2021 December and that was launched on infrared and near infrared wavelengths or wavelengths on the electromagnetic spectrum that are visible to humans. And that can be felt as heat. So, his predecessor, the Hubble Space Telescope, was primarily designed to find visible spectrum light and ultraviolet light, a wavelength that's often produced by, let's say, youngish stars.