Justi ut sidera fulgent=--The just shine as the stars.
Sublimi feriam sidera vertice=--I shall strike the 20 stars with my uplifted head.
Thereupon the Goddess led Theodorus into one of the halls of the palace: when he was within, it was no longer a hall, it was a world, Solemque suum, sua sidera norat.
His sensim auxiliis instructa fidelibus, olim Mens humilis nulloque jacens ingloria cultu Carceris in tenebris mox sese attolit in auras Dives opum variarum, et sidera scandit Olympi.
Hence Virgil represents Æneas as praying with his hands stretched out to heaven--Duplices tendens ad sidera palmas.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "sidera" in a variety of sentences. We hope that you will now be able to make sentences using this word.