A wonderful resource of visualizations to help understand celestial phenomena.
The SVS makes use of images from e.g. the Lunar Reconnaissance Orbiter and the Deep Space Climate Observatory to create visualizations of phenomena like eclipses of the Moon.
“The Moon always keeps the same face to us, but not exactly the same face. Because of the tilt and shape of its orbit, we see the Moon from slightly different angles over the course of a month. When a month is compressed into 24 seconds, as it is in this animation, our changing view of the Moon makes it look like it’s wobbling. This wobble is called libration.”
Shows how the orbital plane of the Moon creates the potential for an eclipse only when the intersection with the ecliptic plane is oriented towards the Sun.
“A NASA camera aboard the Deep Space Climate Observatory (DSCOVR) satellite captured a unique view of the moon as it moved in front of the sunlit side of Earth last month. The series of test images shows the fully illuminated “dark side” of the moon that is never visible from Earth.”