Material Detail

Helix Nebula

Helix Nebula

This Hubble Space Telescope image shows knots of gas surrounding a dying star in the Helix Nebula, the closest planetary nebula to Earth. You will find information about these knots and their relationship to the missing mass in our galaxy, or "dark matter."


  • User Rating
  • Comments
  • Learning Exercises
  • Bookmark Collections
  • Course ePortfolios
  • Accessibility Info

More about this material


Log in to participate in the discussions or sign up if you are not already a MERLOT member.