Astronomical Journals

Access to licensed online journals is only possible via the University Library (UB). Access from outside the university network (this does not include the VPN in this case) will require an Uni-ID and/or a Heidi account, and in some cases, this might be the case from inside the university network as well, depending on the licensing terms of the journal. 

https://ezb.ur.de/ezeit/search.phtml?bibid=UBHE&colors=3&lang=en

Note: In the past, access to some journals was possible via a proxy at ZAH. This doesn't work anymore.