Space Engineers is another entry in the voxel based spaceship game subgenre, it's much more polished in terms of graphics and includes a very nice physics system for handling collisions. It's still in alpha though, no weapons and no multiplayer at this time. http://spaceengineersgame.com ... https://www.youtube.com/watch?v=pH6v19Tt6iE

There's a lot of concern right now about the future of Earth based astronomy with the prospect of thousands more satellites getting in the way of ground based telescopes. What's the balance between science & culture vs worldwide network accessiblility? Trevor Mahlman's Starlink video https://www.youtube.com/watch?v=VaVCp-gNVOU Here's Trevor's guide on how to find the Starlink train while it's still close together. https://www.tmahlmann.com/2019/05/how-to-watch-or-photograph-starlink/ ... https://www.youtube.com/watch?v=GEuMFJSZmpc

It's entirely possible to measure the distance to the moon using regular everyday cameras. Observers stationed a long distance apart can work in pairs to take images of the moon and surrounding stars. These photos will show slight differences in the location of the moon on the sky, and knowing the baseline the distance to the moon can be calculated. It's even possible to approximate the distance to the moon just by a single observer able to take high resolution images of the moon and measuring the change in observed size of the disc. Also, while I don't demo this technique it's possible to look at how the motion of the moon across the sky speeds up and slows down due to the rotation of the observer with the earth, but that requires a lot more data points. Measuring the baseline actually turns out to be the most complicated chunk of math here, I might make a separate video on that, but I need spreadsheets first. ... https://www.youtube.com/watch?v=GTtce3rJxhc

This is the second part of a 100 minute voyage to Duna and back. All 3 parts are 100 minutes in total, and recorded without editing or interruption. Here, i show that I really have a hard time landing. ... https://www.youtube.com/watch?v=nNap3bgG30k