Shape of Craters, Max Size for a Telescope, Atmospheres of Black Holes | Q&A 292

Why are most craters circular, no matter which angle the meteor falls? Is there a size limit for a telescope before diminishing returns take place? Can black holes have atmospheres? Answering all these questions and more in this Q&A show.

Watch the video here (with no ads) or on YouTube: https://youtu.be/MaKWptXAxC8

Here's a link to the full, unedited live stream: https://youtube.com/live/qewhrFrFz8k