It is the strongest source of photons capable of ionizing hydrogen atoms in interstellar gas near the sun, and is very important in determining the ionization state of the Local Interstellar Cloud.
Sigma Alpha Epsilon | Delta Kappa Epsilon | Alpha Epsilon Pi | Sigma Phi Epsilon | Phi Sigma Epsilon | Tau Kappa Epsilon | Microsporum canis | Lambda Phi Epsilon | Eta Ursae Majoris | Epsilon Indi | Canis Major | Alpha Epsilon Delta | Upsilon Pi Epsilon | Trichodectes canis | Sigma Iota Epsilon | Pi Sigma Epsilon | Pi1 Ursae Majoris | Nu Kappa Epsilon | Epsilon Pegasi | Epsilon | DTM plate on the right showing color change after two day's growth; ''Microsporum canis | Delta Epsilon Sigma | Carasobarbus canis | Canis | Alpha Omega Epsilon |