The Helix Nebula: Knots of Wonder

Running time: 4 min 21 sec

QUICKTIME VIDEO FORMAT

• 320x240 - 11.27 MB
• 640x480 - 29.54 MB

WINDOWS MEDIA PLAYER FORMAT

• 320x240 - 45.54 MB

MACROMEDIA FLASH FORMAT

• 320x240 - 15.71 MB
• 640x480 - 45.21 MB

MPEG-1 FORMAT

• 320x240 - 33.29 MB

Planetary nebula form when stars like our Sun cast off their outer layers of gas, forming glowing shells around the heart of a dying star. This quick broadcast, called a HubbleMinute, shows a new image of the Helix nebula and explains the forces behind its creation.