... Scattered within this cavernous nebula, cataloged as NGC 604, are over 200 newly formed hot, massive, stars. ... Hyakutake: Comet Atmosphere . ... The atmosphere of a comet comes and goes. ... Yesterday the Mars Global Surveyor project released a new close-up image of a portion of the Cydonia region on Mars. ... Observations in the 1970s detected no nebular material, but this image from March 1996 clearly shows the Stingray's emerging bubbles and rings of shocked and ionized gas. Iridium Flare . ...