Albert Einstein

https://www.youtube.com/watch?v=E9R1X3B2KSw

Isaac Newton & Gravity - Painovoima

https://www.youtube.com/watch?v=rOtWO94ld3o

Planets and Our Solar system - Planeetat ja Aurinkokunta

https://www.youtube.com/watch?v=Qd6nLM2QlWw