the Universe ( Full Documentary by History Channel)

http://www.youtube.com/watch?v=kdUqv-wQrVY

solar eclipse/lunar eclipse; rotation/revolution

lunar eclipse:  http://www.youtube.com/watch?v=wuhNZejHeBg
solar eclipse:  http://www.youtube.com/watch?v=E1B3RLf1A1s&feature=related
rotation/revolution:  http://www.brightstorm.com/science/physics/circular-motion-and-rotational-mechanics/rotation-and-revolution/
spring tide/neap tide:  http://www.youtube.com/watch?v=E8PPg5t4YyY

the sun and related videos

Star size comparison:   http://www.youtube.com/watch?v=zWpZ1gIEHhY&feature=related

The biggest star in the universe:  http://www.youtube.com/watch?v=2LUQVzerseI&feature=related

The sun (4 related videos):   http://www.bbc.co.uk/science/space/solarsystem/sun_and_planets/sun#p005xg9b

Exploring the sun:  http://www.youtube.com/watch?v=x6RYgQ2jxCU&feature=related

Cosmic Journeys: Attack of the Sun 24 minutes:  http://www.youtube.com/watch?v=fMUHkz5nx8g&feature=related