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Διαστημόπλοιο μελετά τα όρια του ηλιακού συστήματο - Ο IBEX της ΝΑΣΑ - sed.gr
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30 Οκτ 2008, 23:27

Διαστημόπλοιο μελετά τα όρια του ηλιακού μας συστήματος

Ο IBEX της ΝΑΣΑ

"Ένα διαστημόπλοιο της ΝΑΣΑ ταξίδεψε γύρω από τη Γη τη Δευτέρα ξεκινώντας έτσι την πορεία του για την εξερεύνηση των ορίων του ηλιακού μας συστήματος."r

Η αποστολή του IBEX (Interstellar Boundary Explorer), στην οποία συμμετέχει και ο τομέας της Αστροφυσικής, Αστρονομίας και Μηχανικής του τμήματος Φυσικής του Πανεπιστημίου Αθηνών, ξεκίνησε την Κυριακή το απόγευμα με την εκτόξευση του διαστημοπλοίου από ένα απομακρυσμένο νησί του Ειρηνικού Ωκεανού, όπως ανέφερε η ΝΑΣΑ.

Αν όλα πάνε σύμφωνα με το πρόγραμμα, ο IBEX θα γίνει το πρώτο διαστημόπλοιο που θα χαρτογραφήσει τα εξωτερικά όρια του ηλιακού συστήματος - ένας χώρος όπου ο ηλιακός άνεμος συγκρούεται με τα αέρια που έρχονται έξω από το ηλιακό σύστημα.

Αποτελεί μια σημαντική περιοχή μελέτης, λένε οι επιστήμονες, καθώς λειτουργεί ως ασπίδα προστασίας για τις πιο επικίνδυνες κοσμικές ακτίνες, οι οποίες υπό διαφορετικές συνθήκες θα εισέβαλλαν στο διαστημικό χώρο γύρω από τη Γη.

«Κανείς δεν έχει δει εικόνες από την αλληλεπίδραση στην άκρη του ηλιακού μας συστήματος μεταξύ του ηλιακού ανέμου και του διαστρικού χώρου», επισημαίνει ο κύριος ερευνητής της αποστολής David McComas του Southwest Research Institute στο Σαν Αντόνιο του Τέξας.

«Ξέρουμε ότι θα εκπλαγούμε» είπε σε μια δήλωση του.

Μετά από 45 μέρες δοκιμαστικής περιόδου, το διαστημόπλοιο θα ξεκινήσει την αποστολή του. Θα χαρτογραφήσει την απομακρυσμένη περιοχή μετρώντας το αποτέλεσμα της πρόσκρουσης μορίων υψηλής ταχύτητας - τα οποία ονομάζονται ενεργητικά ουδέτερα άτομα- πάνω στο διαστημόπλοιο.

«Ο IBEX θα μας βοηθήσει στο να σχηματίσουμε για πρώτη φορά μια νοερή εικόνα του πλανήτη μας μέσα στο σύνολο του γαλαξία και να εξερευνήσουμε το πώς σχηματίστηκε μέσα στην ιστορία του ηλιακού συστήματος», δήλωσε ο McComas στην ιστοσελίδα της ΝΑΣΑ.

«Έχοντας τις πρώτες εικόνες των διαστρικών συνόρων που αγγίζουν το ηλιακό μας σύστημα, θα μπορέσουμε να κάνουμε ένα βήμα ακόμα στην πορεία εξερεύνησης των ορίων του γαλαξία.»

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