Astrophoto can be done with any camera, and you have a great set to start with. What else you need would be a sturdy tripod or, if you into "real" astrophoto - tracking equatorial telescope mount (EQ3 or EQ5). They also come in GOTO variant - it's when the mount points the telescope or camera at the object on your command from a remote or computer. Mind it-expensive beasts are them.
Tracking mounts allow for multiple shots of the same objects with minimum deviation - which could be combined later in some image stacking software producing stunning results. the software aligns the images by the markers pointed to by you and makes some extra tweaks.
At your current level I would go for wide-field photos with tripod and leave stacking alone for a while. When you figure out working camera in the dark and making starry sky shots proceeding to more advanced stuff will be very logical.
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