At the Edge of the Helix Nebula . ... Credit Copyright: R. O'Dell and K. Handron ( Rice University ), NASA Explanation: While exploring the inner edge of the Helix Nebula with the Hubble Space Telescope 's Wide Field Planetary Camera 2 , astronomers were able to produce this striking image - rich in details of an exotic environment. ... The inner edge of the Helix Nebula , also known as NGC 7293, is in the direction toward the central star, which is toward the bottom right. ...