Coursera Project - Solar System

Coursera Project upload - Solar System

Updates:
- move Earth to give space to Venus, Mercury
- make Moon a touch closer to Earth
- add Venus
- add Mercury
- add Mars
- tilt Main Camera
- tweak Sun lightning
- tweak Comet tail

Issues:
- MacOS build may need a signature or something, shows "You do not have permsiison to open the applicaton..." window

Thank you for taking a look!