There's a pretty good explanation of how lunar eclipses work here (includes a video animation): https://www.jpl.nasa.gov/edu/news/2019/1/11/how-to-watch-the-on

There's a pretty good explanation of how lunar eclipses work here (includes a video animation): https://www.jpl.nasa.gov/edu/news/2019/1/11/how-to-watch-the-only-total-lunar-eclipse-of-2019-plus-a-supermoon https://www.jpl.nasa.gov/edu/news/2019/1/11/how-to-watch-the... You can read about lunar phases here: https://en.wikipedia.org/wiki/Lunar_phase https://en.wikipedia.org/wiki/Lunar_phase