- A lion cub accompanying Leo, introduced by the Polish astronomer Johannes Hevelius in his star catalogue of 1687 and depicted in his star atlas published posthumously in 1690. He formed it from 18 faint stars between Ursa Major and Leo where the short-lived constellation Jordanus once flowed. The brightest stars of Leo Minor are of only fourth magnitude and there are no legends associated with it.
- Incredible Moiré Patterns! (youtube.com)
Sir Roger Penrose demonstrates the extraordinary moiré patterns produced by overlaying and rotating two identical, repeating patterns. As the two patterns overlapped and rotated they interfere with each other to produce tertiary patterns.