Messaging The Aliens, Moving the Earth, Shapes of Coronagraphs | Q&A 258

How can we let aliens know we're here? What does a lunar eclipse look like as seen from the Moon? Can we record a supernova in real time? Why aren't coronagraphs just circles? Answering all these questions and more in this week's Q&A show.

Watch the video here (with no ads) or on YouTube: https://youtu.be/mz-DcU2VaAs

Here's a link to the full unedited live stream: https://youtube.com/live/mCF5QsBegw4

Messaging The Aliens, Moving the Earth, Shapes of Coronagraphs | Q&A 258 (Vimeo)