That's a great suggestion for a more accurate render, but I want the author to know that I still think they did an amazing job. It's fun and it looks great. (Your feedback was really constructive, and I don't think the author will misinterpret it. Some of the other commenters here, on the other hand...)

I have two additional feature requests:

1. Persistent URLs (replaceState)

2. Lunar eclipses

Absolutely they did a fantastic job, already a hundred times better than any web stuff I have ever done.