More pictures of stars. The Atlas of the Universe website has gone, so this is a copy I found on a French site of all stars within 250 light years. That’s why it says Soleil in the middle.
A light year is how far light travels in one year. The speed of light is the fastest there is, the fastest things can cause other things to happen. So let’s see, radio waves and television and light that left the Earth 50 years ago would be getting to Ursa Major around now.