 Hello, and welcome to our 2019 review. 2019 was another exciting year and a long string of good years for astronomy discoveries. This past year we had a comet pass through from another solar system. We had a good look at the Southern Crab Nebula, which can only be seen in the Southern Hemisphere. We'll examine the space between two colliding galaxies. We'll see a galaxy that's losing all of its gas. We'll see a ring galaxy, very rare, and we'll talk about how they're formed. We'll see a new galaxy discovered accidentally by the Hubble Space Telescope as it was looking for something else. And we'll see one of the largest gamma ray bursts in history. And we'll see a galaxy that shows in the sky as an arc, a series of arcs. But the biggest news in 2019 was the release of an image of a black hole by the Event Horizon Telescope team. We'll do a deep dive into that image, what it shows, how they got it, and the implications for taking radio waves and turning them into images, and the implications for the general theory of relativity. In the credits, I want to bring your attention to a new book that's been made available on astronomy that's available online for free. I used it. And thanks to Jonathan Onstead, we have a new wiki, How Far Away Is It? wiki, where we can discuss what's in this video or any video on the How Far Away Is It? channel. I trust that you'll find it informative and interesting. We'll start close to home with the new comment.