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Ανδρομέδα - Ο μέγας σπειροειδής αποκαλύπτεται - sed.gr
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Δημοσιεύσεις: 1848
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06 Ιαν 2011, 10:15

Ανδρομέδα:Ο μέγας σπειροειδής γαλαξίας της "γειτονιάς" μας αποκαλύπτεται

Στη δημοσιότητα έδωσε σήμερα η Εθνική Υπηρεσία Διαστήματος των Η.Π.Α. (NASA) την πρώτη λεπτομερειακή απεικόνιση του γαλαξία της Ανδρομέδας.

Σύμφωνα με τη NASA, η φωτογραφία τραβήχτηκε ανήμερα των Χριστουγέννων από το διαστημικό τηλεσκόπιο υπέρυθρης απεικόνισης, Herschel.

Όπως εκτιμούν οι αστρονόμοι, οι μεγάλοι δακτύλιοι σκόνης που περιβάλλουν το κέντρο του γαλαξία ενδέχεται να είναι το αποτέλεσμα της σύγκρουσης ενός μικρότερου γαλαξία με την Ανδρομέδα κάποια στιγμή στο παρελθόν.

[img0]http://img707.imageshack.us/img707/4956/andromedagy.jpg[/img0]

Η εικόνα είναι ένας συνδυασμός απεικονίσεων από το Διαστημικό Παρατηρητήριο Herschel που έγιναν με υπέρυθρη ακτινοβολία (πορτοκαλί χρώμα) και από το τηλεσκόπιο XMM- Newton το οποίο χρησιμοποιεί ακτίνες Χ (μπλε χρώμα).

Η Ανδρομέδα είναι ο κοντινότερος σε απόσταση γαλαξίας σε σχέση με το ηλιακό μας σύστημα.
Μπάμπης Εγγλέζος

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