Εμφάνιση ενός μόνο μηνύματος
  #97  
Παλιά 16-04-07, 08:09
Το avatar του χρήστη Xenios
Xenios Ο χρήστης Xenios δεν είναι συνδεδεμένος
Administrator
 

Τελευταία φορά Online: 12-11-16 11:12
Φύλο: Άντρας


MWC 922: The Red Square Nebula
Credit & Copyright: Peter Tuthill (Sydney U.)

Explanation: What could cause a nebula to appear square? No one is quite sure. The hot star system known as MWC 922, however, appears to be imbedded in a nebula with just such a shape. The above image combines infrared exposures from the Hale Telescope on Mt. Palomar in California, and the Keck-2 Telescope on Mauna Kea in Hawaii. A leading progenitor hypothesis for the square nebula is that the central star or stars somehow expelled cones of gas during a late developmental stage. For MWC 922, these cones happen to incorporate nearly right angles and be visible from the sides. Supporting evidence for the cone hypothesis includes radial spokes in the image that might run along the cone walls. Researchers speculate that the cones viewed from another angle would appear similar to the gigantic rings of supernova 1987A, possibly indicating that a star in MWC 922 might one day itself explode in a similar supernova.

Πηγή
__________________
όταν γράφεται η ιστορία της ζωής σου,
μην αφήνεις κανέναν να κρατάει την πένα
Απάντηση με παράθεση