In the following entries, the observations and reflections of mariners and astronomers are recorded. Each log is encrypted with a cipher known only to the adept navigators.
Entry Date: 7th August 1581
Upon the rise of the sixth progeny of the Tiara, we charted a course westward, wherein the sun met the horizon at an angle that defied expectation. Our quadrant revealed a latitude bereft of terrestrial measure and steeped in astral congruence. Refer to cipher: Zcgz Ulm Ghol, Vlim Rgof
Entry Date: 23rd April 1620
By the third hour of the solar ascent, the celestial compass dictated our bearing. The winds, once turbulent, yielded to the intonation of stars. The Voyager's eye witnessed phenomena unrecorded in the annals of terrestrial scholarship. Cipher employed: Pzm Hxors Nqkqc, Tme Nguie
Entry Date: 11th February 1697
As the North Gyre clamored in our wake, the age-old instruments beckoned for recalibration. The paradigm of known directions shifted imperceptibly. On this day, decretals from Neptune himself were inscribed. Utilized cipher: Mbx Tazbu Hksxq
Decrypt the ciphers using the key below:
Vigenère Cipher Key: "CONSTELLATION"
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