Yes, I have made some discoveries that I thought were pretty neat, and that got their fair share of recognition. When I was a graduate student at Harvard, I was the first to discover that the center of our Milky Way galaxy is not producing its fair share of very massive stars compared to other places in the Milky Way today. I concluded that something is seriously wrong with the environment of the center of our galaxy that prevents very big stars from being formed today. Something stopped this normal star formation process for big stars about 10 million years ago. We still do not understand exactly what this may have been. In the mid-1980's I discovered a dozen very peculiar clouds in interstellar space that looked like their shapes were being streamlined by moving very fast through some rarified interstellar gas. I worked out from my observations the physics of what might be going on, and I was happy to see that my predictions agreed pretty well with what other astronomers has also discovered about this interstellar gas.