The cuscenes i refer to were never made - they exist only as scripts in the FSReference Bible which is is questionable canonicity. However there are remennts of these scenes.
The Fall of Vasuda Prime and the Lucifer at Ribos only exist canonically as Command briefing ani.
The Barfight between pair of terrans and a pair of Vasudans only exists as a secret movie on the Silent Threat CD of a single Zod beating on a Terran.
And terran news broadcasters only exist canonically as still images in the Credits.
The cut-scenes scripts in the RefBible refer to ship flying within the atmosphere. However the scripts never mention which class these ships are. Also, since these cutscenes were canned, their canonicity is questionable.
Sofar as im aware, the only ship shown to canonically be capable of atmospheric flight is the Satis. A bunch more ships can be seen in the Fall of Vasuda Prime briefing ani, but they are too small to be identified.
Talnia - Only a single canon reference to this star system exists in canon. Thus the star system exists, but the location of the system (where it nodes to) is unknown.
Avalon - An island from the tales of King Arthur