Moon chasing. Usually we see 16 moonsets & moonrises a day, but every so often our orbit happens to be right over the day/night line on Earth & the moon & sun never appear to set. Add in a partial lunar eclipse and the #Apollo50th Anniversary, & it’s a magical time to moon gaze. pic.twitter.com/6PckPsVPyO
Lava lake cycling is a whole 'nother level of weird.
Some volcanoes maintain a near-steady levels (Mauna Ulu, Kīlauea), while others rise & fall (Pu'u 'O'o, Kīlauea on a 15-20min cycle) depending on how bubbles releas gas from the lake lava and magma in its conduit & reservoir. pic.twitter.com/D9zjTEbWn3
For some reason my memory of college astrophysics was that in million of years we reach a gravitationally locker condition where the earth’s rotation rate and lunar orbit period were the same. May be a false memory. Need to go look that up again.
When the Moon first formed, four billion years ago, it was 20x closer than it is today, 400x larger on the sky, and Tides were 8,000x higher.