The Earth hurtles through space, 2019-07-26
An animation about the Earth's actual orbital speed. Not what you would expect.
Black Hole Zoo, 2019-05-11
Some technicalities of black holes.

Celestia picture of the hour

This picture was created with Celestia virtual planetarium. Click to see in full. A new image is generated every hour, the object, the time and the direction is randomly chosen. It is not that simple, but that's the gist of it.