Image Credit & Copyright: William Vrbasso
Text: Cecilia Chirenti (NASA GSFCUMCPCRESST II)

The red “monster” shown in the image is Cometary Globule CG 4, 1,300 light-years away in the Constellation Puppis. CG 4 is a molecular cloud, where hydrogen becomes cold enough to form molecules that can be brought together by gravity to create stars. The shape of CG 4 resembles that of a comet, but its head is 1.5 light-year in diameter and its tail is 8 light-years long.

Astronomers believe that the tail of a cometary globule could have been shaped by a nearby supernova explosion or by irradiation from hot, massive stars. Indeed, CG 4 and other nearby globules point away from the Vela Supernova Remnant, at the center of the Gum Nebula. The edge-on spiral galaxy, ESO 257-19, is more than a hundred million light-years beyond CG 4, and is completely safe from the “monster”.

by Professor_Moraiarkar

11 Comments

  1. ImpaleExpale on

    Friends who ride majestic, translucent steeds, shooting flaming arrows across the bridge of Hemdale.