This week in SF history
— June 29, 1961, Thor-Ablestar upper stage exploded, the first unintended space debris event in history (spacesafetymagazine.com) (books.google.com)
Spaceflight news
— NASA releases BAA for Gateway’s Power and Propulsion Element. (parabolicarc.com)
Short & Sweet
— The last Falcon 9 Block 4 prepares for flight (nasaspaceflight.com)
— Business Time will have to wait (twitter.com/rocketlab)
Upcoming spaceflight events
— Jeff Hoffman’s talk
— Event page (tudelft.nl)
— Streaming page (collegerama.tudelft.nl)